OYAL. 
Caves. —11. Examine the floors of caves by cuttings from 
the surface as far as the solid rock ; take sections of the deposits 
and note the relics discovered in each stratum. In limestone 
caverns, note the thickness of any stalagmite coating upon or 
beneath the floors. 12. It must he remembered that strata 
representing vast periods of time may be represented by de¬ 
posits only a few feet or even inches in thickness, and that a 
very false impression might be conveyed by any error in 
labelling or describing the position of the specimens. Animal 
remains should be preserved for examination at home, and for 
submission to a comparative anatomist, especially if the tra¬ 
veller is not one himself. 13. Note the elevation of the mouths 
of the caverns above the existing watercourses, and give plans 
and sections when practicable. 
Neolithic (Surface) Period .—14. Implements of neolithic 
