Just came across this post by accident and it relates indirectly to something I was researching. The Roscommon Journal for February 1844 carried an article about an attack on Martin Kenny the steward to C W. Blakeney of Hollywell (the next townland to Derrane) and I quote "that very active and praiseworthy magistrate, Edmond Corr Esq of Durham proceeded to the places and succeeded in apprehending a young man of the name of Tighe". I think that confirms a Corr association with Durham House in 1844. Hope this is some small help.