Ad Acta sanctorum quotquot toto orbe coluntur, vel a catholicis scriptoribus celebrantur, ex Latinis et Graecis aliarumque gentium antiquis monumentis hactenus collecta, supplementum. Volumen complectens auctaria Octobris et tabulas generales …

[… Scilicet Ephemerides et Indicem Alphabeticum Sanctorum decem priorum mensium, duplicem Elenchum Sanctorum de quibus agendum in prosecutione operis Bollandiani, necnon Syllabum Nominum rerumque Notabilium, quae in Praefationibus, Tractatibus praeliminaribus, etc. continentur], [8] + 216 + xxviii + 562 + [4]pp., 42cm., printer's device on title page, text printed in 2 columns, hardcover binding in black cloth (gilt title on spine, some traces of shelf wear, joints reinforced, small corner of front board detached), marbled endpapers, small ex-libris stamp on title page, few foxing, volume 50 bis of the Acta Sanctorum, text in Latin, weight: 4.2 kg., [second title page concerning the Auctaria mentioning "Auctaria seu notae ad Acta sanctorum tomorum I, V & VI Octobris conscripta a Josepho Van hecke, Benjamino Bossue, Victore De Buck, Antonio Tinnebroeck, Societatis Jesu presbyteris theologis, seorsim pridem edita, nunc in unum conflata et juxta normam totius Operis Bollandiani disposita indicibusque locupletata, curante L.M. Rigollot, presbytero Lingonensi], H113851