About the middle of November 1716, John Graham of Killearn, already mentioned as factor of the Montrose family, went to a place called Chapel Errock, where the tenants of the Duke were summoned to appear with their termly rents.

They appeared accordingly, and the factor had received ready money to the amount of about L300, when Rob Roy entered the room at the head of an armed party.

The Steward endeavoured to protect the Duke's property by throwing the books of accounts and money into a garret, trusting they might escape notice.

But the experienced freebooter was not to be baffled where such a prize was at stake.

He recovered the books and cash, placed himself calmly in the receipt of custom, examined the accounts, pocketed the money, and gave receipts on the Duke's part, saying he would hold reckoning with the Duke of Montrose out of the damages which he had sustained by his Grace's means, in which he included the losses he had suffered, as well by the burning of his house by General Cadogan, as by the later expedition against Craig-Royston.