ALLAN QUATERMAIN was first published as a serialization in Longman's Magazine, published by Longmans, Green and Co., in 8 parts from January through August 1887, but without any illustrations.
According to McKay, Scott and Whatmore, the first British edition included not only 112 numbered large-paper copies, but apparently 20,000 copies of the first trade edition were printed and published for sale July 1, 1887 by Longmans. The first editions contains 20 illustrations by Charles Kerr, engraved by J.Cooper, plus 11 other drawings and two charts.
The first American edition was published by Harper & Brothers on July 1, 1887 in both soft paper covers, and hardcovers, with the same illustrations as found in the Longmans edition.
In London, circa 1906, George Newnes published an edition with 4 illustrations by Cyrus Cuneo.
See the VisualHaggard.org page dedicated to the illustrations found in various editions.
Apparently, foxing plagues these large-paper editions.
Some of the photos were supplied by David Frank(also shown the 1896 title-page)
I sold the copy (a first edition) below to another collector