 To Maynard we owe the unique edition of the reports of Richard de Winchedon, being the "Year Books of Edward II", covering substantially the entire reign to Trinity term 1326, together with excerpts from the records of Edward I, London (1678–9).Maynard amassed a large fortune, bought the manor of Gunnersbury, and there in 1663 built from designs by Inigo Jones or his pupil Webb a palace, Gunnersbury House, (afterwards the residence of the Princess Amelia, daughter of George II).He died there on 9 October 1690, his body lying in state until the 25th, when it was interred with great pomp in Ealing Church.