It is not clear to which text Godwin is referring but there is a possibility that it might be The Class Book; or, three hundred and sixty-five reading lessons adapted to the use of schools (RIchard Phillips, 1806) or any one of a number of books by David Blair (Phillips's pseudonym under which Fenwick wrote). Alternatively, it may refer to something that Godwin wrote to/for her husband, John Fenwick, who had given himself up to creditors by returning to London in January 1806.