Keatinge travelled to Morocco while an officer on half-pay in 1784 and many years later published an account of his experiences.
He voted for the Union in defiance of county politics, for which the Castle thought he deserved notice, but on taking his seat at Westminster went over to opposition with the Leinster family. On 19 Mar. 1801 he was in the minority on the Irish master of the rolls bill and on 25 Mar. on Grey’s censure motion. He also attempted, 5 Feb., 27 Mar., to sponsor a scheme for Irish poor relief, which was hampered by his ignorance of English parliamentary procedure and by dilatory official returns. He attended in the ensuing session, but there is no evidence of his activity. Keatinge sought but did not obtain re-election in 1802, when the Duke of Leinster, who had in any case fallen out with him, was unwilling to pit him against a government candidate.
