In 1774 he joined in partnership with his apprentice John Bennett (fl.1774-83), who had been made free in that year. The understanding was that in four years Bennett would become a partner with a third share in the business. The agreement allowed Bennett to continue more with the print side of the business and the management on a day-to-day basis. It allowed Sayer to take on less work and focus on maps which was his area of expertise.
This chart is credited to a Captain George Haytor of the East India Company. He surveyed these waters in the ‘York’. Hong Kong is here named ‘Fan-Chin-Cheou or He-ong-Kong’, the former is not known to appear on any other map according to Talbot. As was the case at the time, the myriad of islands in the mouth of the Canton River took time to chart. Here Hong Kong is depicted as two islands with a narrow strait between. The island of Lantao is also poorly depicted. Sanderson (1971) 417 no. 55; Shirley (2004) M.Say-3a no. 91; Talbot (1970).
A Chart of the China Sea from the Island of Sanciam to Pedra Branca with the Course of the River Tigris from Canton to Macao