For 10 points, name this author who also wrote about John Furriskey and Pooka MacPhellimey in
This author left the novel Slattery's Sago Saga unfinished at his death. He wrote a column for The Irish Times called Cruiskeen Lawn. Father Fahrt and Mr. Collopy are among the characters who neglect the orphan Finnbarr in his novel The Hard Life. Many of the footnotes in one of his novels deal with a mad scientist named De Selby, who appears in The Dalkey Archive as well as a novel in which Divney steals Mathers' cash box, The Third Policeman. For 10 points, name this author who also wrote about John Furriskey and Pooka MacPhellimey in At Swim-Two-Birds.
This author left the novel Slattery's Sago Saga unfinished at his death.
{Flann O'Brien} [or {Brian O'Nolan}; or {Myles na gCopaleen}]