From Thackeray's Works - The New Household Edition

Joseph Knight Company Boston Publisher 

University Press John Wilson and Son Cambridge

Vanity Fair: A Novel Without a Hero Complete in 3 Volumes , Vol 1, 2 & 3-Three Books 

This is a nice antiquarian set of Thackeray.  Burgundy Covers with Roughcut Edges,  Gold writing and Gold Gilt top edges, These Books are in Good Condition for age, I do not see any markings, insides, pages are slightly tanned, so just a flew small flaws, outside cover boards show a little general shelf wear, bumps and marks. Books are about  5.25" x 7.5"   each having around 400 pages 

The Joseph Knight Company published from around 1889 to 1897 and it was acquired in 1896 by Louis Coues Page (1869-1956), who "renamed it L. C. Page & Company" (L. C. Page)

See Wikipedia, "Louis Coues Page", So even though I can not find a date, I would guess this book to be published around from the late 1880's to the Mid 1890's or around 1895.  So Set is undated, but the publisher published circa 1900

See Pictures of the Actual Books.