L. D’O. Walters, in A Complete Guide To Wiltshire, published in 1920, noted:
Chapmanslade (Stations: Frome, 4m.; Warminster, 4m., G.W.R.). – The road left of the village leads by the side of Black Dog Wood, 1m. across the county boundary into Dorset, and so to Frome, 4m., to the right the road leads to Westbury, 4m.
In the village is the Church of S.S. Philip and James, built in 1867.
The name is probably from the A.S. chepe = a market, and gelad or lad = a way, and so it is “the way of the marketers or pedlars.”