Meantime the siege lasted nearly a fortnight, and the garrison were reduced to the greatest extremity for provisions. One hope, however, the commandant had, and that was of sallying forth, and escaping. The Castle of Menzies was then occupied by Colonel Webster, who was posted there in order to secure the passage of the river Tay; and, as an alternative to starvation, a scheme was suggested for stealing out from Blair in the night time, and marching through a mountainous part of country to join the king's troops at Castle Menzies. Whilst this project was in contemplation, the brave garrison were threatened with a new danger. During the blockade, there was heard a noise of knocking, seemingly beneath the floor of the Castle, as if miners were at work in its deep vaults, to blow it up. All the inmates of Blair thought such must indeed be the case: for Lord George had now gained possession of a bowling-green near the Castle, and also of a house in which the bowls were kept: from this bowl-house a subterranean passage might easily have been dug to the very centre of the ground underneath the building, and a chamber or mine formed there for holding barrels of gunpowder, sufficient to complete the work of destruction. This scheme must have occurred to the mind of Lord George Murray, who was born at Blair, and well acquainted with its construction. His objections to pursue it appear, as has been stated, to have been perceived and controverted by the Marquis of Tullibardine. They arose, as he has himself declared, and as the English also appear to have considered, from his want of workmen to perform the attempt. The plan of undermining was not thought practicable; and the noise which so greatly alarmed the garrison was proved to be only the reverberation of strokes of an axe with which a soldier was cutting a block of wood which lay on the floor of one of the uppermost rooms. The most unfavourable suspicions were, however, eventually affixed to Lord George's neglect of this mode of attack. Whether such conduct proceeded, on his part, from an aversion to destroy the home of his youth, and his birthplace; whether he had still hopes of reducing Sir Andrew to capitulate; or whether, as it has been often vaguely asserted, a secret agreement existed between himself and James, Duke of Atholl, that the Castle should be saved, can only be determined by a far closer insight into motives than human power can obtain. We may accord to Lord George Murray, without a blemish on his fidelity, a pardonable reluctance to level to the dust the pride of his family; that every effort was made to subdue Blair, except the last, is evident from the testimony of all contemporary historians.