Pts. 1-8 are lithographic reprints of the original ed. of 1908-49, reproduced in 1963 from "the Museum's working copy, which contains numerous manuscript additions and corrections ... The annotations do not record later acquisitions."
Vol. <11-> has title: Catalogue of books printed in the XVth century now in the British Library.
Vol. 11 and 13 have imprint: Goy-Houten, Netherlands : Hes & De Graaf
Facsimiles issued with each part; those for pts. 1-3 and 4-7 are separately bound in 2 v.
"The present catalogue is based on the arrangement of the incunabula in the British Museum planned and in great part carried out by the late Robert Proctor, and completed from his notes afer his death. The arrangement itself was founded on the unofficial 'Index to the early printed books in the British Museum, with notes of those in the Bodleian Library', published by Proctor in 1898".--Introd.
Pts. 1-4 edited by A. W. Pollard; pts. 5-8 by Victor Scholderer; pts. 9-10 by G. D. Painter; pt. 11 by Lotte Hellinga; pt. 12 by D.E. Rhodes.
With introductions on the history of the presses, indexes, concordances of Proctor numbers, etc.
"Index to parts I-III": pt. 3, p. 819-864. "Index to parts, IV-VII": pt. 7, p. 1153-1213. "Part IV. Italy: Subiaco and Rome. Index. The Hague, M. Nijhoff, 1916" (16 p.) inserted in pt. 4.