For reference here's the newspaper article connecting James Caldwell, butcher of Edinburgh, to Widgeon Lodge.
Caledonian Mercury, 26 May 1851: Supper and Presentation- "Mr. James Caldwell, flesher, Home Street, Edinburgh, who has taken a lease of upwards of six hundred acres of the lands of Widgeon Lodge, Newtonlimavady, county of Londonderry, Ireland... previous of his leaving Edinburgh..."