G. T. Lapsley

Gaillard Thomas Lapsley (1871–1949) was an American constitutional historian and fellow of Trinity College, Cambridge University, 1904-1949.

A brass plaque exists to Lapsley's memory in Trinity College Chapel.

• The county palatine of Durham: A study in constitutional history. Longmans Green, New York, 1900.
• The America of today, being lectures delivered at the local lectures summer meeting of the University of Cambridge, 1918. University Press, Cambridge, 1919.
• "The Parliamentary title of Henry IV", English Historical Review, XLIX (1934).
• Some recent advance in English constitutional history: (before 1485). University Press, Cambridge, 1936.
• Crown, community, and Parliament in the later Middle Ages; studies in English constitutional history. Blackwell, Oxford, 1951. (Oxford Studies in Mediaeval History, Vol. 6.)