Martin's major work was "The Grasshopper" in Lombard Street, a history of Martins Bank. The bank was at one time the property of Sir Thomas Gresham, whose crest, the Grasshopper, the name commemorates.[4]
His paper "Our Gold Coinage", 1882, helped enable the late 19th century reform of the gold currency. It was a statistical inquiry into its condition at the time, showing the depreciation of the coinage from 1817, the date when UK gold coinage was resumed after the Napoleonic Wars. It appeared in the Journal of the Bankers' Institute: to which, as well as to the Journal of the Royal Statistical Society, he was a frequent contributor. He was President of the Royal Statistical Society at the time of his death. His article on "The Evolution of our Banking System" in the Economic Journal for 1891 was noted for its insights.[4]
123Rawson, Rawson W. (1897). "John Biddulph Martin M.A.". Bulletin de l'Institut International de Statistique. x (2). Rome: Imprimerie Nationale: 155–157. hdl:2027/osu.32435063002018.
123"Mr John Biddulph Martin, M.A.". Journal of the Royal Statistical Society. 60 (2): 434. 1 June 1897. JSTOR2979802.