Proposals for publishing by subscription By John Boydell, Engraver, No. 90, Cheapside, A collection of prints, taken from antique gems, and engraved by Mr. J. Spilsbury - Spilsbury, John 1730?-1795? (s.n, 1781)
"It is proposed to publish four numbers, each containing ten prints. .. If this work meets the approbation of the public, it will be continued, and a number published every three months
'A collection of fifty prints from antique gems' was published in 1785
Dated at head: March 25, 1781
English Short Title Catalog, T168872
Reproduction of original from British Library