A geological map of the
Bristol Coalfield, on a scale of four inches to the mile, was Sanders's major work; it was begun in 1835 and finished in 1862, when it was published. It covered an area of 720 square miles, and was laid down from his own surveys. The preparatory topographical map was made under his care and at his own expense, by collating about one hundred parish maps on different scales. Sanders wrote five papers, read to the
British Association, and co-operated with
John Phillips's survey of North Devon. He also published a pamphlet on the crystalline form of
celestine from Pyle Hill, Bristol, and made a manuscript study of the railway
cuttings on from
Bath through Bristol to
Taunton. He supplied evidence to the health of towns commission, 1844–5, and for a report to the
General Board of Health (1850). == Honours ==