Sadly, very little is known about this title. It is thought that this was the last film to be actively directed by Grierson and as it was based on a subject so close to his heart, it is wholly appropriate that he narrates the film himself with a free-running unscripted commentary. It does not appear to be made up from left-over footage from either Drifters or Granton Trawler and therefore seems to indicate that a separate shooting trip had been carried out.