National Screen and Sound Archive of Wales preserves and celebrates the sound and moving image heritage of Wales, making it accessible to a wide range of users for enjoyment and learning. Its film collection reflects every aspect of the nation’s social, cultural and working life across the 20th century, giving a fascinating insight into Welsh filmmaking, both amateur and professional.
This film is part of Free

Mingo & Jerry, Thea and Jerry
Mingo, Jerry and Thea: names of the dogs or people seen? Either way, they will be connected, for sure, with Isla Johnston of Bryn Mêl, Glyngarth, Anglesey, who shot the footage.
From the collection of:

Overview
Dogs, dogs, glorious dogs: several terriers, a pekinese, a sheep dog at full pelt, a terrier/doberman shaped dog and a bull-dog/boxer type. But which answers to the name Mingo, Jerry or Thea, the names given on the original film can? Or are these names belonging to the people seen? What is certain is that all of them – whether human or animal – will be connected with the film-maker, Isla Johnston, of 'Bryn Mêl', Glyngarth, Anglesey.
Kenneth O Morgan – born in London in 1934 and brought up in Aberdyfi, was Principal of the University of Wales, Aberystwyth 1989-94 and has written biographies of e.g. David Lloyd George, Keir Hardie, Michael Foot. Jane Keeler (1949-92), born in Harrogate and brought up in Wrexham, was a criminologist and historian.