Sir Alexander held Prestonfield and Corstorphine under several strict entails dating to 1720, one of which prevented any heir from setting tacks for more than one lifetime. Sir Alexander's father, Sir William, set a tack in Drysdale that John Dick, as tutor to his nephew, sought to have voided. An Act of Parliament allowed certain types of tacks in contravention of entail clauses, but Dick maintained that the statute did not apply in this case.
"Shaw's Digest." Bell and Lamond, Digests of Cases Decided in the Supreme Courts of Scotland, pg. 571