70 Director's Annual Report. 
Austral Islands, collected for the Museum by Mr. Seale in 1902. 
The channels are .1 inch deep and .6 inch wide, and had been 
slightly scratched by a pointed tool (as may be seen in the illustra- 
tion) before the specimen reached the Museum. It was broken 
from the smallest of a circle of upright stones, all similarly 
graved. The surface of the stone has been bleached to a depth 

FIG. 50. PETROGILYPHS FROM BORABORA, SOCIETY ID. 
varying from .1 to .3 inch by weathering and makes a strong con- 
trast with the almost black stone showing at the broken edge. 
The bleached part is naturally softer than the interior, and if this 
skin had been penetrated by the graving in order to bring out the 
contrast of the dark and the light, the weather has since made the 
whole surface uniform. 
The other instance is of several petroglyphs on a large stone in 
Borabora, Society Islands. A postal card illustrating these was 
given to the writer, in answer to enquiries for rock-carvings in the 
South Pacific, by an officer of ee French cruiser ‘‘Protet,’’ and I 
294 ] 
