Biography
Steward in England to the 10th Lord Eglinton. Following the Lord's death in 1769, Crookshanks received an annual "pension" of £100.
Life with Boswell
Boswell met him several times in the spring and summer of 1763, and took a liking to Crookshanks, whom he described as "a spirited fellow [who] has read a good deal, and is much of a gentleman"1 and "a fine, lively, extravagant fellow"2 . Crookshanks sometimes visited Boswell in Downing Street, and they breakfasted together on at least one occasion, on June 10, 1763.