During the late 1950s and 1960s Jonah did not produce many watercolours, but from time to time he did do sketches, for instance during his visits to Rome in 1959 and Florence in 1961. Occasionally he also drew images on his walks in the mountains of Eryri (Snowdonia). Powerful and vigorous, the striking Summit of Tryfan Under Snow is an example of Jonah’s landscape painting at its best.
