I would like to determine exactly when the books with floral covers were produced by the Edinburgh publishers Oliphant, Anderson & Ferrier between about 1880 and 1900.

I’ve been acquiring books that were produced by the Edinburgh publishers Oliphant, Anderson & Ferrier between about 1880 and 1900. Specifically, I’ve been looking at their floral covers, because something very interesting seems to have happened around about 1890.