Watt and Murray, Fasti, 12; Watt, Graduates, 145-6: Roger was born in 1232 or before of unknown, but likely English, origins, as his surname is derived from Derby, England, and he held a benefice in Lincolnshire. He may or may not be related to his clerical predecessor Stephen of Derby, who was in the familia of Aberdeen bishop from 1239-66. Roger was master by 1252 and became a canon of Dunkeld by 13 June 1252, which he probably still held on 24 June 1257. He was a canon of Aberdeen by 1 August 1259 and then appears as precentor there by 11 June 1265 or 6 February 1266 and still held that office on 16 October 1268. He also held the church of Donington on Bain (Lincolnshire) at his death. He was probably in England during his early career. He was dead by 19 November 1270, when he was succeeded in the church of Donington by a Master Andrew of Derby.