The following titles were bound together when Morris owned them but were later separated, probably when Malleus maleficarum was rebacked:
[1] Institoris, Heinrich [Henricus], and Jakob [Jacobus] Sprenger. Malleus maleficarum. Nuremburg: Anton Koberger, 17 March 1494.
References: Ellis valuation, fol. 26b (£1). — ISTC (ii00166000). — MS catalogue (2), no. 940.
Digital version: ULD.
[2] Gaza, Theodorus. Grammaticae institutionis libri duo priores. Trans. Desiderius Erasmus. Basel: Johann Froben, 1521.
Illustrated.
Digital version: BSB.
Provenance: Congregation of the Brothers of the Common Life in the Luchtenhofe in Bruhle in Hildesheim. — Morris. — Richard Bennett. — Sotheby 1898, lot 493 (sold to Pickering for £1 1s.). — William Norton Bullard. — Francis A. Countway Library of Medicine, Harvard University (William Norton Bullard Collection, no. 654). [The present location of Gaza’s grammar is unknown.]
Sotheby 1898:
The Library of William Morris 
April 12, 2017
1494, 1521