[Isaac Roberts, Welsh geologist and astronomer.] Autograph Note Signed, a presentation inscription of a book to the mathematician and geologist A. H. Green.

1p, 12mo. On aged and creased leaf, folded once and with traces of mount on the blank reverse. Reads: 'Presented to Prof. Alexr. H. Green M.A. F.R.S. With the compliments of the author | Isaac Roberts | June 1894'. The work presented was presumably the first (1893) volume of Roberts' pioneering 'Selection of Photographs of Stars, Star-Clusters and Nebulae', the second appearing in 1899. The two volumes contained 125 reproductions of photographs which he had exhibited at the Royal Astronomical Society. See both men's entries in the Oxford DNB.