Published online by Cambridge University Press: 02 January 2015
1 e.g. The Ordnance Survey (for map revision) ; the Ministry of Health and the Dept. of Health for Scotland (for Town Planning); the Ministry of Transport (for Road Engineering), etc. The writer is indebted to the Dept. of Health for Scotland and in particular to Mrs J. K. S. Petrie for information about the survey and access to the Scottish photographs received to date.
2 pp. 73 and 81.
3 Air-Photography Applied to Surveying, p. 26.
4 For an admirable summary of the lacunae in our knowledge of Roman Britain, which air-photography may help to bridge, cf. Richmond, , Journal of Roman Studies XXXIII, 45 ffGoogle Scholar. NOTE. The defensive rampart on Arthur's Seat is shortly to be published by Mr R. B. K. Stevenson who first identified it on the ground.