Copy of a letter to Mr. Edward Watkins advising him to contact Mr. John Gerrard about Richard Trevithick’s time in South America and referring to a grant obtained by Richard Trevithick from the Spanish government for discovering a track across Isthmus and Panama. Francis refers to enclosures (not with the copy) including sketches of a steam boat designed by Richard Trevithick, an idea for using metal sails and a drawing of an engine made for discharging vessels. (1 sheet/2pp.)