From Book Owners Online
BUTLER, Viscount Mountgarret d.between 1735 and 1751
A bookplate of the first half of the 18th century, "Lord Mountgarretts Library" (Franks 4625), must relate to one or more of the Viscounts Mountgarret; a branch of the Butler family held this title in the peerage of Ireland, and 4 Viscounts followed in swift succession between Edmund, 6th Viscount (1663-1735) and Edmund, 9th Viscount (1687-1751). It may have been used by later Viscounts also. The extent of the library is not known.
- Viscount Mountgarret, Wikipedia.
- Gambier Howe, E. R. J. Franks bequest: catalogue of British and American book plates bequeathed to the ... British Museum. London, 1903.