The following titles are bound together (in Leighton’s usual quarter-linen style, probably done for Morris in the 1890s):
[1] Chaucer, Geoffrey. A one-text print of Chaucer’s minor poems. Ed. Frederick J. Furnivall. Chaucer Society publications, 1st ser. London: published for the Chaucer Society by N. Trübner & Co., 1871–1880.
Issued in two parts; Morris owned the first.
[2] Furnivall, Frederick J. Trial-forewords to my “Parallel-text edition of Chaucer’s minor poems” for the Chaucer Society. Chaucer Society publications, 2nd ser. London: published for the Chaucer Society by N. Trübner & Co., 1871–1873.
Morris owned the second part, “Further additions and corrections” (20 December 1873).
Provenance: Morris. — Richard Bennett. — [Probably] Sotheby 1898, lot 210 (part; sold to Sotheran for £1 18s.). — University of Maryland Libraries, Maryland Room (Rare Stacks PR1853 .F86 1868).
Sotheby 1898:
The Library of William Morris 
February 5, 2018
19th cent.