After the collapse of Hamilton’s army at Uttoxeter in August 1648, a body of Covenanters assembled at Mauchline, in Ayrshire, to protest against the leniency with which the Engagement had been treated in the Estates, where, indeed, a considerable minority had been inclined openly to countenance it.  Their leader was at first the Earl of Eglinton, a staunch Covenanting lord; but as they gathered strength Argyle joined them with his Highlanders, and the command soon passed into his hands.  The Protesters marched upon Edinburgh.  In an attempt to take Stirling Castle they were defeated by Sir George Monro with a division of Hamilton’s army which had not crossed the border; but Argyle had better tools to work with than the claymores of his Highlanders.  He opened negotiations with Cromwell, who led an army in person into Scotland, renewed the Covenant, laid before the Estates (the new Estates of Argyle and his party) certain considerations, as he diplomatically called them, demanding, among other things, that no person accessory to the Engagement should be hereafter employed in any public place or trust.  The Committee were only too willing to have the support of Cromwell to what they themselves so vehemently desired.  Two Acts were quickly passed:  one reversing many of the acts of its predecessors and confirming the considerations:  the other, known in history as the Act of Classes, defining the various misdemeanours which were to exclude men from sitting in Parliament or holding any public office, for a period measured by their offences, and practically to be determined by the judicatories of the Kirk.

This Mauchline Convention was popularly known at the time as the Whiggamores’ Raid, a name memorable as the first introduction into history of a word soon to become only too familiar, and still a part of our political vocabulary.[8] Its immediate result was to throw the direction of affairs still more exclusively into the hands of the clergy:  indirectly, but no less surely, it was the cause of the Pentland Rising and the savage persecution which followed, of the murder of Archbishop Sharp, of the battles of Drumclog and Bothwell Bridge, and of those terrible years still spoken of in Scotland as the “killing-time.”  It was, in short, like the wrath of Achilles, the spring of unnumbered woes.

Then followed the execution of Charles.  Against this the whole body of Presbyterians joined in protesting.  The hereditary right of kings was, indeed, as much a principle of the Covenant as their divine right was opposed to it; and the execution at Whitehall on January 30th, 1649, was regarded with as much horror by the Presbyterians of England as by the Presbyterians of Scotland.