Barry Cockcroft, a Yorkshire TV documentary maker made this film in 1975 about Grisedale, which neighbours Mallerstang beneath Wild Boar Fell. There was also an accompanying book. It tells the story of the last remaining occupant of Grisedale in a time before widespread hill farming subsidies and before offcomers and holiday makers repopulated it and other valleys. I have just found that the original film is now available on BFIplayer linked here and it is a good portrait of people and place nearly 50 years ago.

https://player.bfi.org.uk/free/film/watch-dale-that-died-1975-online