Here’s a link to a documentary made by Channel 4 in 1983. It features Margrie Farm in Borgue and some interesting interviews with local land owners.

The following links are from the National Library of Scotland and feature some shots of the Borgue area

A trip round Galloway, fleeting glimpse of Carrick Beach at about 17.00: https://movingimage.nls.uk/film/2249?search_term=galloway&search_join_type=AND&search_fuzzy=yes

Lovely farming shots from 1961: https://movingimage.nls.uk/film/1132?search_term=galloway&search_join_type=AND&search_fuzzy=yes