90 Bibliography of Stonehenge and Avebury. 



1877. Petrology of Stonehenge. Wilts Mag., XVII., 147 — 

 1G0 ; with plate. 



The stones are of four kinds : (1) the local sarsens — a tertiary sandstone of 

 which all the trilithons (including the stones of the outer circle) are 

 composed: (2) the " altar-stone " — a grey micaceous grit, perhaps of Old 

 Red Sandstone from the Mendip Hills : (3) most of the so-called " foreign 

 stones " which compose the inner circle and the inner horseshoe are a kind 

 of diabase : and (4) the remainder of these foreign stones are horn-stones 

 and schists. Rocks similar to the "foreign stones" occur in Wales and 

 Cumberland. 



Maskelyne. Prof N. S. 1883. Petrology of Stonehenge. 

 Proc. GcoL Assoc., VII., 138— U0. 

 An abstract of the paper in the Wilts Mag. for 1877. 



Masson, Prof. David [b. 1822]: Historiographer Royal for 

 Scotland. 



1856. "Aubrey." British Quart. Rev., XXIV., 153—182. 



A good account of the famous Wiltshire " antiquary and gossip." 



Match am, Geo. [1789 — 1877]: Chairman, Wilts Quarter 



Sessions. 



1851. Arch/eol. Investigation in Wilts. Memoirs on Wilts 

 [Archoeol. Inst] ; 8vo., pp. 1 — 15: London. 



A general account of the subject ; describing the work of Stukeley, Hoare, 

 and many others. 



1851. Stonehenge. Memoirs on Wilts . [ArcheeoL Inat.] ; 



8vo., pp. 121 — 134: London. 



Adopts, with some variations, Duke's theory as to Stonehenge being an 

 astronomical "stone almanac," constructed by the Druids. 



Maton, W. G-. [1774—1835] : Physician. 



171)7. Observations on the Western Counties; two vols., 



xi., ."».SG, and -10; index; sixteen plates and maps: Salisbury. 



Describes stone-circles near Winterbourne Abbas and Penzance. Cromlechs 

 (I.. l 22.">) are sepulchral memorials. 



L800. Fall of Stones at Stonehenoe. Archovologia, 



XIII., lO.'i— 100; with two plates. 



The great trilithon on the N. side of the altar fell on '.I Jan.. 17D7. The 

 cause was thought to bo " a sudden and rapid thaw succeeding 

 a very deep suow." Only fragments of sandstone and masses of chalk 

 woro found in the cavities thus opened in the ground. 



