Dr Glasscock was University Lecturer in Geography prior to his retirement.
His research covers aspects of the history and settlement of the UK and Ireland in the medieval period.
The Lay Subsidy of 1334 , O.U.P. for the British Academy, 1975.
Irish geographical studies ed. with N. Stephens, Queen's University Belfast, 1970.
Historic landscapes of Britain from the air, CUP, 1992.
The Cambridgeshire Domesday, Alecto Historical Editions, 1990.
