It is needless to notice how much this license must interfere with cultivation. "Leaving the _cultivated_ land, we turn more inland, and pass two or three small lakes. The muirs are mossy and sterile in the highest degree; the hills are clad with stunted heather, intermixed with huge great stones; much of an astringent root with a yellow flower, called _Tormentil_, used by the islanders in dressing leather in lieu of the oak bark. We climbed a hill, about three miles from Lerwick, to a cairn which presents a fine view of the indented coast of the island, and the distant isles of Mousa and others. Unfortunately the day is rather hazy--return by a circuitous route, through the same sterile country. These muirs are used as a commonty by the proprietors of the parishes in which they lie, and each, without any regard to the extent of his peculiar property, puts as much stock upon them as he chooses. The sheep are miserable looking, hairy-legged creatures, of all colors, even to sky-blue. I often wondered where Jacob got speckled lambs; I think now they must have been of the Shetland stock. In our return, pass the upper end of the little lake of _Cleik-him-in_, which is divided by a rude causeway from another small loch, communicating with it, however, by a sluice, for the purpose of driving a mill. But such a mill! The wheel is horizontal, with the cogs turned diagonally to the water; the beam stands upright, and is inserted in a stone-quern of the old-fashioned construction. This simple machine is enclosed in a hovel about the size of a pig-sty--and there is the mill![63] There are about 500 such mills in Shetland, each incapable of grinding more than a sack at a time.