Beyond this, all is very difficult to explain and understand. The church of Kirk o’ Field, and the quadrangle of houses tenanted, just as in Oxford or Cambridge, by the Prebendaries and Provost of that collegiate church, lay, at an early date, _outside_ of the walls of Edinburgh. This is proved by the very name of the collegiate church, ‘St. Mary in the Fields.’ But by 1531, a royal charter speaks of ‘the College Church of the Blessed Virgin Mary in the Fields, _within the walls_ of the burgh of Edinburgh,’ the city wall having been recently extended in that direction.[119] The monastery of the Black Friars, close to Kirk o’ Field, was also included, by 1531, within the walls of the burgh. But the town wall which encircled Kirk o’ Field and the Black Friars on the south, was always in a ruinous condition. In 1541, we find the Town Council demanding that ‘ane honest substantious wall’ shall be made in another quarter.[120] In 1554, the Provost and Prebendaries of Kirk o’ Field granted part of their grounds to the Duke of Châtelherault, because their own houses had been ‘burned down and destroyed by their auld enemies of England,’ in the invasions of 1544-1547.[121] In 1544-1547, the town wall encircling Kirk o’ Field on the south must also have been partially ruined. Châtelherault built on the ground thus acquired, quite close to Kirk o’ Field, a large new house or château from which, according to George Buchanan, Archbishop Hamilton sent forth ruffians to aid in Darnley’s murder.