That's nice that they called their home in NZ Gorswen, a pleasant reminder of the home so far away in Wales. I had not heard of the artists colony in Trefriw until you mentioned it so I looked it up on Google:-
The Artists' Colony The latter 19th century saw a number of artists living in Trefriw. The art movement, which had started in Betws-y-coed in the 1850s, popularized by David Cox, saw a movement down the valley following the arrival of the railway in Betws-y-coed. In 1871 William Barker lived in the village, and the 1881 census recorded another 8 artists living in the village, namely John Davies, Ben Fowler, Robert Goody, Julius Hare, Henry Hilton, John Johnson, James Morland and Henry Boberts.[7] Although artists continued to live here until after the turn of the century, like Betws-y-coed it became a victim of its own popularity. The movement therefore again re-established itself, this time at Tal-y-bont and Llanbedr-y-cennin, where its 40 members included those artists from Trefriw. Here in a building they set up an ‘Artists Club’, and its members were a strong influence on the formation of the Royal Cambrian Academy of Art, which moved into Plas Mawr, Conwy in 1886.[