8vo. vii, [1], 47pp, [1]. Interleaved throughout. With an engraved plate. Original publisher's maroon cloth, printed paper lettering-piece to upper board. Rubbed, marked, and heavily sunned. Occasional spotting, plate damp-stained at head. Presentation copy, inked inscription to recto of FFEP: 'Colonel J. P. (?)Leslie / with the writer's kindest regards / Croydon 2d. August 1847.'

A rare survival of the sole edition of a series of observations on the correct method for manufacturing gunpowder that originally formed an appendix to a report on the past operations and present and prospective capabilities of the Gunpowder Manufactory at Bombay, prepared for the Military Board in 1839.

OCLC and COPAC together locate copies at just three locations (BL, Hagley Museum, and Smithsonian).