Mosley’s father was born in Lancashire but made his fortune as a cloth merchant, alderman and lord mayor of London before retiring to Hough End Hall, which he built in around 1596.
Mosley spent most of his time in London, where his father helped him obtain reversions to the offices of town clerk, common serjeant, and secondary of both compters. He served as London’s standing counsel from 1604, and became a judge in the sheriff’s court in 1610; however, his reversions to the town clerkship and other offices never fell in, and had been transferred by 1605 to (Sir) Thomas Coventry*, who later worked alongside him both as legal counsellor and judge. Mosley resided at Gray’s Inn, and was admitted to the readers’ table in January 1611 ‘in respect of his judicial place in the city of London provided that he shall not thereby gain any antiquity or other privilege in the house of any others being his ancients’. Upon becoming a bencher a few years later, he received special permission to build a door opening into the inn from his house in Gray’s Inn Lane.
Upon entering the Commons in 1614, Mosley’s main activity was to defend the chancellor of the Duchy, Sir Thomas Parry*, from accusations of electoral abuses at Stockbridge, where there had been a contested election. Parry’s nominees were initially defeated by two local candidates, but duchy pursuivants then allegedly assaulted and arrested several voters prior to a second poll at which the duchy candidates were returned. Mosley argued on 10 May that the arrests were unrelated to the election, but were for the abuse of a duchy commission. He therefore demanded a full inquiry to exonerate Parry, who was threatened with expulsion, as well as a new writ. However, Mosley was unable to save the chancellor from disgrace as he was ‘thought to speak partially’; Sir Roger Owen declared that his eyes were ‘sealed up by his place’.
Mosley was rumoured to be a contender for the chancellorship of the Duchy when it fell vacant in 1618, but the post ultimately went to (Sir) Humphrey May*.
Aspersions were more than once cast upon Mosley’s integrity as attorney of the Duchy. Allegations were first made in 1620 by John Bridgeman, bishop of Chester, who had a case against the mayor and corporation of Wigan pending in the Duchy court. According to Bridgeman, Mosley unfairly favoured the mayor, and decisions were made ‘privately in the upper chamber ... Sir Edward Mosley the attorney having been wrought (God knows how sincerely or corruptly) by the Wiganers’.
Mosley died on 1 July 1638 and was buried at Rolleston church, having already erected a monument containing a large marble effigy of himself recumbent in lawyer’s robes upon an altar under a canopy supported by Corinthian pillars.
