 Shaken by this and suffering from ill-health, Boyd retired once more to Trochrig; he died in January 1627 while visiting Edinburgh.Boyd's major work was an elaborate 'Commentary on the Epistle to the Ephesians', not published until 1652 and described as a theological thesaurus.His Latin poem "Hecatombe ad Christum Salvatorem" was included by Sir John Scot of Scotstarvet in his "Delicias Poetarum Scotorum", reprinted at Edinburgh by Robert Sibbald, nephew of Dr. George Sibbald, who later married his widow Ann.