Field sheets, with a smaller scale reduction and a book of place-names, from a survey of routes in north-east Hupeh (湖北) and south-east Honan (河南) provinces.
Field sheets, with a smaller scale reduction, from a survey of routes originating southern Hupeh (湖北), continuing though northern Hunan (湖南), and western Hupeh, and terminating in eastern Szechwan (四川) province.