Among the Lukis MSS. in the Lukis Museum, St. Peter Port, Guernsey, are some plans of burial chambers in the neighbourhood of Bennac, a small village in the commune of Salles-la-Source, in the Aveyron. Bennac is about two and a half kilometres south-east of Salles-la-Source itself, and some nine kilometres north-west of Rodez, the chief town of the department. These plans were made by Sir Henry Dryden and the Rev. W. C. Lukis during a visit to Rodez, and they include one of a chambered long barrow (fig. 1), here reproduced by kind permission of the authorities of the Lukis Museum. This plan is dated 17th September 1872 and is described as ‘Oval Barrow no. 2 at Vennac’: the total length of the barrow is given as 101 ft. 3 in., while, according to the plan, the maximum breadth is about 65 ft. The barrow is orientated from east to west with the chamber set in the broader east end: from the western edge of the barrow (the outer line) to orthostat D is given as 78 ft. 5 in., and from orthostat D to the eastern edge of the barrow as 22 ft. 10 in. The chamber is a short rectangular gallery from 13 to 14 ft. long and about 5 ft. wide: a note appended to the plan gives the lengths of the orthostats as follows: A, 13 ft. 8 in.; B, 5 ft.; C, 5 ft. 6 in.; and D, 4 ft. 11 in. The height of D is not given, but to the west of this stone, Lukis had written, ‘another chamber?’; which suggested that D was perhaps only a sill-stone.