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This drab coloured sandstone seems to lie here and there in 

 fragments within the enciente of the Camp, but appears in 

 greater quantity, yet stiU in detached pieces, in the fields of the 

 high ground near it. It in fact constitutes the uppermost 

 layer, mixed with scanty alluvial soil, that forms the cultivated 

 surface of the fields. 



The sandstone belongs to the Upper Calcareous Grits and 

 occurs only at intervals along this line of country. It consists 

 of a white calcareous pisolite interspersed throughout a 

 ferruginous sandstone ; each particle of the pea-grit is coated 

 with ferric oxide. Exposed as a surface bed, the rain with its 

 Carbonic acid has dissolved out the lime ; so that when tested 

 with strong mineral acids, the rock does not effervesce ; and 

 thus it is left full of lenticular shaped cavities, each cyst being 

 lined with a film of red oxide of iron, that has withstood the 

 attacks of the Carbonic acid. 



The specific gravity of the rock is but 2*056. When 

 examined with a lens, the rock discloses two siliceous con- 

 stituents. I regard it as a re-constituted rock — shortly 

 explained as a marly siliceous sand, throughout which whilst 

 still loose, a calcareous pea-grit has been scattered, prior to 

 the chemical changes that removed the lime and left the iron. 

 These chemical causes have produced a vesicular state, which 

 plainly accounts for the slight density of the rock. The light 

 weight of the stone drew the attention of the country folk to it, 

 and fancy did the rest ; and thus was created the myth of the 

 ancient warriors and the pumice-stones of Eingsbury Camp." 



From Eingsbury the party was conducted by Mr. McKnight 

 to his pleasant residence at Lydiard Manor, where a supply of 

 cooling drinks proved very welcome, for the heat of the day 

 was great. 



A shoirt walk brought the party to the Church of Lydiard, 

 which dates from 1424, and possesses a Norman font, probably 

 belonging to an earlier Church on the same site. 



Their next visit was to Purton Church, of late Perpendicular 

 work, dating from about 1480. From thence they went to a 

 field near the residence of Major Prower, where they were 



