Boteler’s half-brother was in the service of the 3rd earl of Cumberland, and Boteler himself was described by Cumberland’s nephew, Henry, Lord Clifford*, as ‘my worthy friend and cousin’.
As a client of the Cliffords, Boteler helped canvas for Sir Thomas Wentworth*, Clifford’s brother-in-law, in the 1625 Yorkshire election, which resulted in a contest that Wentworth won amid great controversy.
As a passive royalist in the Civil War, Boteler took shelter in the York garrison, and contributed to the king’s war coffers by the purchase of a baronetcy. At the age of 63 he petitioned to compound for his delinquency on 22 July 1646, and was fined £569 on an estate that brought him in £424 a year.
