[3] He exhibited thirteen pictures, chiefly portraits of racehorses and their owners, at the Royal Academy, 1801–1812 and 1818–19.

Other engraved pictures are Hap-hazard and Muly Moloch, racehorses belonging to the Earl of Darlington, engraved as a pair by W. and G. Cooke, 1805, from pictures at Raby Castle; The Earl of Darlington and his Foxhounds, by T. Dean, 1805, and the companion subject, Francis Dukinfield Astley and his Harriers, by R. Woodman, 1809; Sir Teddy, mezzotint by Charles Turner, 1808; Sancho, a pointer belonging to Sir John Shelley, etched by Charles Turner in 1808; and Diamond, a racehorse, engraved in mezzotint by W. Barnard in 1811.

[4] Sixty paintings of sportsmen, horses, and dogs by Marshall were engraved by John Scott for Wheble's Sporting Magazine, vols.

Marshall's exhibited and engraved works represent but a small proportion of the commissions which he carried out for patrons of the turf and masters of hounds throughout the country.

[2] He became a regular contributor of letters about horse racing in The Sporting Magazine from 1821 until 1833, writing under the pseudonym 'The Observator'.