Copy instruction of Alexander Black and others against Commissioner of Supply of Kincardine Copy instruction of Alexander Black and Alexander Cheyne as Commissioners of Supply of the County of Kincardine, noted that their taking their seats was protested by Lord Monboddo who claimed that they were not entitled to act as Commissioners of Supply. Their claim to title within the County of Kincardine as office bearers of the Burgh of Aberdeen is outlined in this instruction. 1775