On the death of his father, his mother had remarried Henry Montagu, 1st Earl of Manchester, allowing the young Hare to rise rapidly in Court and social circles.
He married Montagu's daughter by his first marriage and purchased the manor of Tottenham, including the Lordship House, in 1625, and was raised to the Irish peerage as Baron Coleraine shortly thereafter.
His castle at Longford and his house in Totteridge were seized by Parliamentary forces, and returned upon the Restoration in a severe state of disrepair.
Lord Coleraine died at his home in Totteridge in 1667, having choked to death on a bone eating turkey whilst laughing and drinking.
[4] He also left him his law library in the hope that he would follow the legal profession, but Hare contented himself by becoming a student of the Inner Temple in November 1620.