diff --git a/TODO.md b/TODO.md
index c9b29de..967a392 100644
--- a/TODO.md
+++ b/TODO.md
@@ -144,7 +144,13 @@ saint has the same kind of mismatch.
   Margaret of Antioch, Apollinaris, James the Greater [reworded English,
   same fix as Matthias/Barnabas], Anne, Nazarius/Celsus/Victor I/
   Innocent I, Abdon and Sennen).
-- **August-December (41 saints): not started.**
+- **August (12 total): done, all 12.** 1 corrected (Peter's Chains), 9
+  authored fresh (Dominic, Ss. Cyriacus/Largus/Smaragdus, Assumption,
+  Bernard, Bartholomew [reworded English, same fix as Matthias/Barnabas/
+  James the Greater], Louis, Zephyrinus, Augustine), 2 already correct as
+  found (Finding of St. Stephen, the Decollation of St. John the Baptist
+  — both plain unmodified matches against the live query, no fix needed).
+- **September-December (29 saints): not started.**
 - **~52 temporal entries: not started.**
 - **94 `propers: null` saints: not started** — need a collect authored (a
   bigger, separate task) before an antiphon id even has anywhere to attach.
diff --git a/src/data/propers/common/assumption-antiphon.yml b/src/data/propers/common/assumption-antiphon.yml
new file mode 100644
index 0000000..1b321c4
--- /dev/null
+++ b/src/data/propers/common/assumption-antiphon.yml
@@ -0,0 +1,12 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, the Assumption's own day (2026-08-15) -- the Benedictus
+# antiphon (Cant 6:9). Her Lauds psalmody override (see hours/lauds-
+# psalmody-overrides.ts, TODO.md) is still unauthored -- this is only
+# the Benedictus antiphon, a separate lookup.
+id: assumption-antiphon
+text:
+  la: "Quæ est ista quæ ascéndit sicut auróra consúrgens, pulchra ut luna, elécta ut sol, terríbilis ut castrórum ácies ordináta?"
+  en: "Who is she that cometh up like the rising dawn, fair as the moon, clear as the sun, terrible as a fenced camp set in battle array?"
+status:
+  la: verified
+  en: verified
diff --git a/src/data/propers/common/ss-cyriacus-largus-and-smaragdus-antiphon.yml b/src/data/propers/common/ss-cyriacus-largus-and-smaragdus-antiphon.yml
new file mode 100644
index 0000000..528a68a
--- /dev/null
+++ b/src/data/propers/common/ss-cyriacus-largus-and-smaragdus-antiphon.yml
@@ -0,0 +1,10 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, Ss. Cyriacus, Largus, and Smaragdus's own day (2026-08-08).
+# The Benedictus antiphon.
+id: ss-cyriacus-largus-and-smaragdus-antiphon
+text:
+  la: "Vestri capílli cápitis * omnes numeráti sunt: nolíte timére: multis passéribus melióres estis vos."
+  en: "Even the very hairs of your head are all numbered: * fear not therefore; ye are of more value than many sparrows."
+status:
+  la: verified
+  en: verified
diff --git a/src/data/propers/common/st-augustine-antiphon.yml b/src/data/propers/common/st-augustine-antiphon.yml
new file mode 100644
index 0000000..a85be6d
--- /dev/null
+++ b/src/data/propers/common/st-augustine-antiphon.yml
@@ -0,0 +1,10 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Augustine's own day (2026-08-28). The Benedictus
+# antiphon.
+id: st-augustine-antiphon
+text:
+  la: "Euge, serve bone et fidélis, quia in pauca fuísti fidélis, supra multa te constítuam, dicit Dóminus."
+  en: "Well done, thou good and faithful servant thou hast been faithful over a few things, I will make thee ruler over many things, saith the Lord."
+status:
+  la: verified
+  en: verified
diff --git a/src/data/propers/common/st-bartholomew-antiphon.yml b/src/data/propers/common/st-bartholomew-antiphon.yml
new file mode 100644
index 0000000..0b9f02f
--- /dev/null
+++ b/src/data/propers/common/st-bartholomew-antiphon.yml
@@ -0,0 +1,15 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Bartholomew's own day (2026-08-24) -- the Benedictus
+# antiphon (Matt 19:27ff, same verse as St. Matthias/St. Barnabas/
+# St. James the Greater's own). The source's own English existed but was
+# jarringly modern next to every other antiphon's archaic register --
+# reworded to match (the underlying verse's standard Douay-Rheims
+# wording, same fix as those three), marked draft rather than a straight
+# source transcription.
+id: st-bartholomew-antiphon
+text:
+  la: "Vos qui reliquístis ómnia, et secúti estis me, céntuplum accipiétis, et vitam ætérnam possidébitis."
+  en: "Ye who have left all things, and have followed me, shall receive an hundredfold, and shall possess life everlasting."
+status:
+  la: verified
+  en: draft
diff --git a/src/data/propers/common/st-bernard-antiphon.yml b/src/data/propers/common/st-bernard-antiphon.yml
new file mode 100644
index 0000000..7326dde
--- /dev/null
+++ b/src/data/propers/common/st-bernard-antiphon.yml
@@ -0,0 +1,10 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Bernard's own day (2026-08-20). The Benedictus
+# antiphon.
+id: st-bernard-antiphon
+text:
+  la: "Euge, serve bone et fidélis, quia in pauca fuísti fidélis, supra multa te constítuam, intra in gáudium Dómini tui."
+  en: "Well done, thou good and faithful servant; thou hast been faithful over a few things, I will make thee ruler over many things; enter thou into the joy of thy Lord."
+status:
+  la: verified
+  en: verified
diff --git a/src/data/propers/common/st-dominic-antiphon.yml b/src/data/propers/common/st-dominic-antiphon.yml
new file mode 100644
index 0000000..79afc4b
--- /dev/null
+++ b/src/data/propers/common/st-dominic-antiphon.yml
@@ -0,0 +1,10 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Dominic's own day (2026-08-04). The Benedictus
+# antiphon.
+id: st-dominic-antiphon
+text:
+  la: "Euge, serve bone et fidélis, quia in pauca fuísti fidélis, supra multa te constítuam, intra in gáudium Dómini tui."
+  en: "Well done, thou good and faithful servant; thou hast been faithful over a few things, I will make thee ruler over many things; enter thou into the joy of thy Lord."
+status:
+  la: verified
+  en: verified
diff --git a/src/data/propers/common/st-louis-antiphon.yml b/src/data/propers/common/st-louis-antiphon.yml
new file mode 100644
index 0000000..9328d3f
--- /dev/null
+++ b/src/data/propers/common/st-louis-antiphon.yml
@@ -0,0 +1,9 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Louis's own day (2026-08-25). The Benedictus antiphon.
+id: st-louis-antiphon
+text:
+  la: "Euge, serve bone * et fidélis, quia in pauca fuísti fidélis, supra multa te constítuam, intra in gáudium Dómini tui."
+  en: "Well done, thou good and faithful servant; * thou hast been faithful over a few things, I will make thee ruler over many things; enter thou into the joy of thy Lord."
+status:
+  la: verified
+  en: verified
diff --git a/src/data/propers/common/st-peter-ad-vincula-antiphon.yml b/src/data/propers/common/st-peter-ad-vincula-antiphon.yml
index 59428d9..40b45c3 100644
--- a/src/data/propers/common/st-peter-ad-vincula-antiphon.yml
+++ b/src/data/propers/common/st-peter-ad-vincula-antiphon.yml
@@ -1,12 +1,16 @@
-# Verified against Divinum Officium (Latin/English Sancti/08-01.txt's own
-# [Ant 1] — a deliberate cross-reference to the Chair-of-Peter-at-Antioch
-# antiphon (Feb 22, see chair-of-st-peter-at-antioch-antiphon.yml), same
-# reuse pattern as Ss. Peter and Paul in June. Duplicated content, not a
-# shared reference, matching this project's one-file-per-id convention.
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Peter's Chains's own day (2026-08-01) -- the Benedictus
+# antiphon. Corrects the previous version of this file, which had been
+# sourced from the Roman/secular rite's Sancti/08-01.txt's own [Ant 1]
+# instead: real but different text from what Monastic 1617 actually
+# renders at Lauds, same mistake as St. Lawrence's earlier fix -- shares
+# the same text as the two Chair-of-Peter feasts' and Ss. Peter and
+# Paul's own (all already corrected), confirmed independently rather
+# than assumed.
 id: st-peter-ad-vincula-antiphon
 text:
-  la: "Tu es pastor óvium, * Princeps Apostolórum, tibi tráditæ sunt claves regni cælórum."
-  en: "Thou art the Shepherd * of the sheep, and the Prince of the Apostles, and unto thee are given the keys of the kingdom of heaven."
+  la: "Quodcúmque ligáveris super terram, erit ligátum et in cælis; et quodcúmque sólveris super terram, erit solútum et in cælis: dicit Dóminus Simóni Petro."
+  en: "Thus saith the Lord unto Simon Peter: Whatsoever thou shalt bind on earth, shall be bound in heaven; and whatsoever thou shalt loose on earth, shall be loosed in heaven."
 status:
   la: verified
   en: verified
diff --git a/src/data/propers/common/st-zephyrinus-antiphon.yml b/src/data/propers/common/st-zephyrinus-antiphon.yml
new file mode 100644
index 0000000..b7356b7
--- /dev/null
+++ b/src/data/propers/common/st-zephyrinus-antiphon.yml
@@ -0,0 +1,10 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Zephyrinus's own day (2026-08-26). The Benedictus
+# antiphon.
+id: st-zephyrinus-antiphon
+text:
+  la: "Qui odit * ánimam suam in hoc mundo, in vitam ætérnam custódit eam."
+  en: "He that hateth his life * in this world, shall keep it unto life eternal."
+status:
+  la: verified
+  en: verified