In 1801, before being appointed to the garrison in Dublin, Asgill found himself defending the right of Henry Ellis (in the neighbourhood of Kilkenny) to be properly remunerated for the invaluable intelligence he had provided during the rebellion. His information had made a significant contribution to the suppression of the rebels, but he paid a severe price for his loyalty after the fighting was over. His neighbours persecuted him; tried to kill him; and ruined his business as a miller. The British were very slow to pay his annuity of £30 per annum for life, and he became a ruined man. Sir Charles Asgill and Lord Castlereagh took up his cause (with a Mr A. Marsden) to see that he was properly compensated. Nevertheless, Ellis suffered greatly because of "his grievious situation, and losses, on account of his loyalty to his king and government". When he died he was buried in "an inverted burial in the unconsecrated ground of his own farmland, … The lack of any memorial stone or grave marker is mysterious. Perhaps one was destroyed generations ago by inhabitants of the locality or never erected in anticipation of such an act."