[28]. The Cave of Suitshellir.
[29]. ‘The Crescent and the Cross.’
[30]. ‘On the Moa Caves of New Zealand.’ Edinburgh New Philosophical Journal, vol. lvi. 1854.
[31]. See also the article on Lacustrine Abodes, in the Edin. Review, July 1862.
[32]. Lyell, ‘Antiquity of Man,’ p. 101.
[33]. ‘Wanderungen durch Sicilien.’
[34]. ‘Italy.’
[35]. In the North of England the prices of boring in the ordinary strata of that coal-field are as follows:—
| s. | d. | |
| First five fathoms | 5 | 6 per fathom. |
| Second five ” | 11 | 0 ” |
| Third five ” | 16 | 6 ” |
| Fourth five ” | 22 | 0 ” |
and so increasing 5s. 6d. per fathom on each succeeding depth of five fathoms. In boring through very hard strata the prices are from 80 to 100 per cent. higher.