Copy of a letter to Richard Edmonds (solicitor to the Trevithick family) concerning an application for a patent made by a ‘Mr. Broderip’ and any possible clashes this may have with his gun carriage invention. (1 sheet/1p.) Richard Trevithick writes ‘I think it would be well to attend the patent office... I will write to Mr. Gerrard requesting him to give his assistance.’ (A copy of his letter to John Gerrard can be found at TREVF/4/19)