Among the informers was a noble lady, the mother of Hugh Roe O'Donel and Rory Earl of Tyronnel, who accused Nial Garve, her own son-in-law, of complicity in O'Dogherty's revolt, for which she got a grant of some hundreds of acres in the neighbourhood of Kilmacrenan.
The insurgent leaders and the dangerous kerne having been effectually cleared off in various ways, the whole territory of Inishown was overrun by the king's troops.

The lord deputy, Sir Arthur Chichester, with a numerous retinue, including the attorney-general, sheriffs, lawyers, provosts-martial, engineers, and 'geographers,' made a grand 'progress,' and penetrated for the first time the region which was to become the property of his family.

It was a strange sight to the poor Irish that were suffered to remain.

'As we passed through the glens and forests,' wrote Sir John Davis, 'the wild inhabitants did as much wonder to see the king's deputy as the ghosts in Virgil did to see AEneas alive in hell.' In this exploring tour a thorough knowledge of the country was for the first time obtained, and the attorney-general could report that 'before Michaelmas he would be ready to present to his majesty a perfect survey of six whole counties which he now hath in actual possession in the province of Ulster, of greater extent of land than any prince in Europe hath in his own hands to dispose of.' A vast field for plantation! But Sir John Davis cautioned the Government against the mistakes that caused the failure of former settlements, saying, that if the number of the Scotch and English who were to come to Ireland did not much exceed that of the natives, the latter would quickly 'overgrow them, as weeds overgrow corn.' O'Cahan, who was charged with complicity in O'Dogherty's outbreak, or with being at least a sympathiser, had been arrested, and was kept, with Nial Garve, a close prisoner in Dublin Castle.

An anonymous pamphleteer celebrated the victories that had been achieved by the lord deputy, giving to his work the title, 'The Overthrow of an Irish Rebel,' having for its frontispiece a tower with portcullis, and the O'Dogherty's head impaled in the central embrazure.