As mentioned in
an earlier post, I have been attempting to create a list of the Brölemann manuscripts, with a detailed account of their pre- and post-Brölemann provenances. It is now nearly 100 pages long, and I hope to share it fairly soon.
This exercise has been interesting for lots of reasons, one of which is to see how many later owners were, and still are, unaware of Bröleman's prior ownership. In some cases this is doubtless because the volume has been rebound, and the old covers with the Brölemann bookplate discarded, but in many others the volume has apparently not been rebound, which suggests that the bookplate was never there. I suspect that Henry-Auguste Bröleman (d. 1854), who formed the collection, put his characteristic blue-edged octagonal labels in all his most valuable books, but that towards the end of the century his grandson, Arthur-Auguste (d. 1904), put his bookplate in them only selectively.
Here are some manuscripts whose most recent or current owners seem (according to the most recent descriptions that I can find) not to know of their prior Brölemann provenances: