James Roderick O'Flanagan, Dictionary of National Biography… (1888)
“ In 1864 D'Alton was requested to write the 'History of Dundalk.' He had prepared the earlier part of this work, but as his strength was failing, it was entrusted to Mr. J. R. O'Flanagan, who completed it from the reign of Queen Elizabeth to that of Queen Victoria. D'Alton had great business qualities, and his rigid adherence to the naked facts of history doubtless impaired the literary success of his books. ”
