A unique piece of evidence for the colours of the available fabric as well as its cheapness comes from a guide to Aberystwyth in 1824 written by T.J. Llewelyn Prichard who was born in Breconshire. One of the visitors decided to commission a pair of trousers in local wool, ‘the colour dark blue, with small red stripes; being the very identical material of which the females of the counties of Merioneth, Cardigan, and other parts of Wales, from time immemorial have made their gowns and petticoats.’
These designs became very popular, at least for a season or two, and Prichard approved of this because it would be good for the local industry. He also recorded that three pairs of ‘Welsh Trowsers’ could be bought for the same price as one of other materials. This implies that there was an excess of material available in Aberystwyth at the time. No other known descriptions or illustrations of these trousers survive.
Prichard, Thomas Jeffery Llewelyn, The New Aberystwyth Guide (Aberystwyth, 1824), p. 179