Moll was one of the most important figures in the English map trade in the late seventeenth and early eighteenth centuries. However, very little is known about his background. It seems likely that he came from Germany, possibly Bremen, and was in London by 1678. He worked hard, had a substantial output of cartographic material, as engraver, mapmaker or publisher, such that one might assume that he had assistants or apprentices to help, but there is no evidence of this, and, after his death in 1732, the “Moll firm” disappears without trace. His son Gilles Hendrick obviously predeceased his father, while the surviving daughter, Henderina Amelia Moll, is little more than a name on a will.