Between the rocks there were odd small patches covered with various kinds of plants. Some of them contained ‘Viola tricolor’ [Wild Pansy], of which I saw some that were white in colour, some white and blue, some blue and yellow on the upper petal and blue on the side and bottom petals, others blue and yellow on the side as well as on the upper petal whereas the lower was blue. All of these were growing in a small area no bigger than a plate, and in some cases there was even variation on the same stem – a sure sign that these are not distinct species but that it is the forcing power of the sun which makes for diverse colouration, particularly when there is sufficient water. As there was here, for a small quantity of water was permanently trickling down the hill and keeping it moist. And where would you find a warmer forcing-bed than this?