Doyley was descended from the Norman baron who built Oxford castle in 1071; but recent generations had not lived in the county.
In the first session Doyley was appointed to three committees. One was for a private bill to confirm a decree in Chancery (2 June), while the others concerned the assignment of revenue for the royal Household (18 June) and confirmation of letters patent (5 July).
In 1616 Doyley was accused of having enriched himself as a treasurer of Oxfordshire, one of two officers appointed by the magistrates to collect dues and keep accounts, by withholding pensions from maimed soldiers on account of their lewdness of life.
