"...when I have been in Wales, I have listened in amazement to the wonderful part-singing of youths ...When I myself have appeared on a concert platform in Wales, the Welsh have been most responsive, there appeared to be a real link of appreciation between us, and so when I saw the script ... with its setting in mining life, I was delighted ... It is a true human story."Robeson's explanation about his involvement with the film Proud Valley in 1940 shows what motivated him to come out of retirement to make the film. He considered it to be his most important film.The script was written by ex-miner Jack Jones and shot in the valley mining towns. Proud Valley probably remains the only British film of this period to portray, with an honest sympathy, a Black working-class character.This was Robeson's last film.