44 BRITISH BIRDS. [vol. xiii. 



some two miles to the south and slightly to the west of the 

 extreme end of the Lleyn peninsula of Carnarvonshire, with 

 its long axis almost north and sotith (slightly N.E. and S.W.). 

 It is divided into two unequal halves (the northern being the 

 larger) by the east and west bays, which though not quite 

 opposite one another, only leave a narrow neck of land 

 joining the two portions together. The eastern third, or 

 rather more, of the northern half is occupied by the " moun- 

 tain " an oval, smooth-sided hill rising to 548 feet, its steep, 

 slippery slopes clad with scrubby turf, with patches of bracken 

 and short gorse, with numerous outcropping rocks. The 

 remainder is cut up into small arable and pasture fields, 

 with enclosures of scrub gorse, that is cut for fodder, separated 

 by high turf or turf-topped, stone walls. Down the centre 

 runs a small stream, along which are situated several tiny, 

 swampy enclosures for growing osiers, while just before it 

 reaches the west bay it runs through one or two rush-grown 

 swampy pastures. A narrow rim of scrubby grass and 

 lichen-covered ground surrounds the cultiv^ated area on the 

 north and west sides, separating it from the low, rugged cliff 

 ihat forms the periphery of the island. The ten or eleven 

 farms lie along the foot of the mountain on the road that 

 runs up from the east bay and skirts its western slope. The 

 southern portion of the island, on which stands the lighthouse, 

 is covered for the most part with short, scrubby grass, heather 

 and lichens, with a few small clumps of gorse, and forms a low, 

 slightly hog-backed plateau, rising in the centre to some fifty 

 feet above the sea. 



Most of the migrants were found in the potato and 

 root crops and in the brambles, etc., growing on the 

 walls in the cultivated area, chiefly at the south-eastern 

 end where the cover is best, though after a heavy night- 

 movement at the lantern, there were always some in the 

 gorse on the lighthouse plateau, which was almost the only 

 ground used by Wheatears, while occasionally numbers were 

 found sheltering in the rock crannies and tiny bays round 

 the southern half of the island. A few, such as the 

 Goldcrest, were only met with in the tamarisk and 



