After graduating BA he migrated to Pembroke College, Oxford, and in 1648 was elected to a fellowship at All Souls'.
He then graduated BCL in 1650, was entered as a student at Gray's Inn, and settled there "for good and all" about a year before the Restoration.
He has been often confused with his father's first cousin, Peter, Commissioner of the Navy at Chatham.
A short tract, headed Sir Peter Pett's Paper, 1679, about the Papists, is in the Public Record Office.
[2] His published works are: He edited also the Memoirs of Arthur [Annesley], Earl of Anglesey, 1693, 8vo, and The genuine Remains of Dr. Thomas Barlow, late Lord Bishop of Lincoln, 1693, 8vo.