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of the Islands would be shown in natural relief. Springs or other permanent bodies of fresh water, which are of utmost importance in these generally arid islands, might be discovered in such photographs, as well as other natural resources. Such aerial photographs would ^[[be taken to]] show the zonation of the vegetation and the abundance and distribution of the larger forms of animal life, cattle, ^[[horses, burros, dogs and]] in particular, and, of even greater scientific interest in this connection, the giant tortoises. If the latter are still in existence on islands on which they are believed to be extinct, their presence might be revealed and ^[[would]] further the study of those rare species under natural conditions.

[[Circled marginal note]] Ink part only copied[[/circled marginal note]]
^[[4. The possibility of]]geological ^[[and palaeontological]] investigations ^[[has not been overlooked Such investigations are matters for further consideration.It is possible that cooperation could be furnished interested in [[?]]]]

[[bracketted paragraph]] [[marginal note]] [[double underline]] Omitted[[/double underline]] [[/marginal note]]
a. Studies on certain phases of volcanic activity and quiescence might be profitably carried out in several localities. 
b. The determination of the relative ages of the several islands and their major lava flows by means of radio-active constituents, helium, or uranium content is of considerable interest and may yield important data.
c. A further search for other fossil deposits should be instituted and more intensive investigations made of the known deposits.[[/bracketed paragraph]]

5. Biological investigations ^[[(in part):]]
a. A qualitative and quantitative [[strikethrough]]census[[/strikethrough]] ^[[survey ?]] of the animal populations.
b. Restoration of natural conditions in the Islands and, where practicable, the elimination of introduced noxious animals.
c. Among the birds, the ground finches, Geospizas, offer the most intriguing problem. Extremely little is known about their life, habits, and especially of the variation in the offspring of any