It is worth while to point out that at Challacombe, as elsewhere, the priest-astronomers so located their monuments that the nearly circumpolar stars which were so useful to them should rise over an horizon of some angular height. In this way the direction-lines would be available for a longer period of time, for near the north point the change of azimuth with change in the declination of the star observed is very rapid. _Shovel Down_, near Batworthy (lat. 50° 39′ 20″).--A group of five rows of stones, four double, one single, with two sets of azimuths. One set gives az. 22° 25°, and 28°. They seem to be associated. I will call them A, B, and C. A is directed to the circle on Godleigh Common. Its ends are free. B is a single line of stones to the E. of the triple circle, about which more presently. It is not marked on the Ordnance map; its ends are also free. C has its south end blocked, I think in later times, by a kistvaen. The astronomical direction may be, therefore, either N.W. or S.E. We find a probable use in the N.W. quadrant, as at Challacombe, Arcturus setting at daybreak as a warner of the summer solstice. The height of hills is 46′; we have then:-- Az. N. Dec. Star. Date. N. 22° W. 36° 19′ 40″ Arcturus 1210 B.C. N. 25° W. 35° 23′ 20″ „ 1040 „ N. 28° W. 34° 19′ 30″ „ 850 „ Adjacent to A, B, C, is another avenue, which I will call D. Unlike the others, its northern end points 2° E. of N. Its southern end is blocked by a remarkable triple circle, the end of the avenue close to it being defined by two tall terminal stones. We are justified, then, in thinking that its orientation was towards the north; the height of the horizon I measured as 45′. It may have been an attempt to mark the N. point of the horizon. The triple circle to which I have referred is not an ordinary circle. I believe it to be a later added, much embellished, cairn. According to Ormerod, the diameters are 26, 20, and 3 feet, and there are three small stones at the centre. All the above avenues are on the slope of the hill to the north. On the south slope we find the longest of all, as shown on the Ordnance map survey of 1885. There is a “long stone” in its centre, and at the southern end was formerly a cromlech, the “three boys.” Part of this avenue, and two of the three “boys,” have been taken to build a wall. The long stone remains, because it is a boundary stone! The azimuth is 2° 30′ W. of north or E. of south. Looking N. from the long stone, the height of the horizon is 2° 30′. I think this avenue was an attempt to mark the S. point. _Trowlesworthy_ (lat. 50° 27′ 30″).--The remains here are most interesting. This is the only monument on Dartmoor in which I have so far traced any attempt to locate the sun’s place at rising either for the May or solstitial year. But I will deal with the N.-S. avenue first, as it is this feature which associates it with Fernworthy and Challacombe.