John William Cousin, A Short Biographical Dictionary of English Literature… (1910)
“ By some critics his poetical powers were considered to be such as to have gained for him the first place among Irish poets; but his irregular and intemperate habits prevented him from attaining any sure excellence. His best work, generally inspired by the miseries of his country, often rises to a high level of tragic power, and had his strength of character been equal to his poetic gift it is difficult to say to what heights he might have attained. ”
