Lowther traced his ancestry back to Sir Hugh Lowther, of Lowther, a lawyer who represented Westmorland in 1305.
Lowther took a second house in Kendal ‘for the resort of them that came to me for my profession’ on market days, which also served as the judges’ lodgings during the assizes. It was on the nomination of the assize judges that Lowther joined his father on the Westmorland bench in around 1614. He later proudly recalled that his father was ‘pleased in me when I give the charge, and that my opinion is taken as a rule in that court’.
Lowther was returned to James’s last Parliament as Westmorland’s senior knight of the shire. While in London he lodged at the Inner Temple, and kept company with the Commons’ most eminent lawyer, Sir Edward Coke*, ‘being his daily companion dinner and supper, and I alone’.
Lowther was re-elected as senior knight of the shire in the first three Parliaments of Charles’s reign. In 1625 he was named to committees concerning the king’s tenants of Macclesfield (23 June), larceny (25 June), and sheriffs’ accounts (9 July).
Lowther is not differentiated in the records of the 1626 Parliament from Richard Lowther, who sat for Berwick-upon-Tweed. However, it was almost certainly he, rather than his inexperienced cousin, who responded to calls for an inquiry into the seizure of the French ship, St. Peter of Le Havre, by defending the actions of the Admiralty, saying ‘if there be any power for those goods to belong unto the king then to keep them manfully, [or] else to do justice’; and he was included among the committee appointed to examine it further (23 February).
Lowther’s allegiance to the unpopular royal favourite apparently did him no harm in his own county. Indeed, in 1628 Westmorland paid him the unprecedented compliment of electing his son John II* as his colleague. In the supply debate of 4 Apr. 1628 Lowther spoke in favour of voting five subsidies, the highest amount proposed, so ‘that we may not be made poor but rich by this gift’.
Lowther was removed from the recusancy commission in 1630 after clashing with Wentworth, and the preferments promised him before Buckingham’s assassination never materialized.
Lowther undertook, and his successor continued, an ambitious programme of rebuilding and extension of Lowther Hall.
