King Edward II of England and Archbishop Robert Winchelsey were among his clients, and his legal services secured for him canonries at Hereford and St Paul's, and the precentorship of Exeter Cathedral.
In 1331 he retired to country living (in Wraysbury, Buckinghamshire), and devoted himself to writing the history of his own times.
[1] The chronicle he wrote of his times is entitled "Chronicon, sive res gestae sui temporis quibus ipse interfuit, res Romanas et Gallicas Anglicanis intertexens, 1302-1343" (Cottonian Library MSS., Claudius E VIII).
The annals of St. Paul's edited by Bishop William Stubbs are closely related to the work of Murimuth, but probably not from his pen.
[1] The only complete edition of the Continuatio chronicarum is that by Edward Maunde Thompson (Rolls series, 1889).