IN GR TR AL OF CO xxxxx 1️⃣ 2️⃣ 3️⃣ 4️⃣ 5️⃣ 6️⃣ 7️⃣ ✅ xxxxx AN RP IV alia

1459 ← → 1461

1460 AL Laudemus dominumModus 8

1451 ⟽ AL 8 ⟾ 1461b
1451 ⟽ AL 8 alii ⟾ 1461b 

V. Laudemus dominum quem laudant angeli cui cherubim et seraphim sanctus /
   [...] introire [...] audivis.