I checked in OCLC for books published by Charles L. Webster before
1900 - here is a fairly complete list, although oddly it did not
include Grant's memoirs:

Mark Twain's Library of Humor                  1888
Stories from the Rabbis                        1893
Bacheller, Irving,  Master of Silence          1900
Byers, S.M.H, The happy isles                  1891
Cavazza, Elisabeth,  Don Finimondone           1892
Columbus, Christopher, Writings                1892
Dahlgren, Madeleine, Memoir of John Dahlgren   1891
Filippini, Alexander, One hundred desserts     1893
Henry, George, Progress and Poverty            1893
 "      "  , Social problems                   1893
Howells, William Dean, MT's library of humor   1888
Ireland, Alexander, Life of Jane Welsh Carlyle 1891
Scollard, Clinton, On sunny shores             1893
 "          "    , Under summer skies          1892
Sherman, William T., Memoirs                   1891
Twain, Mark, Adventures of Huckleberry Finn    1885 (many editions)
"     '    , American Claimant                 1900
"     "    , Connecticut Yankee                1889
"     "    , Merry Tales                       1892
"     "    , Prince and the Pauper             1887
"     "    , Stolen white elephant             1894


Terry Ballard
Adelphi University