WCP3553

[1]

Parkstone, Dorset.

Jan^y. 27th. 1893

H. R. Mill¹Esq.

Dear Sir

In your Elementary class Book of General Geography² p. 206, you say — "There are even some broad valleys traversed by rivers, which escape underground, that are quite inaccessible to man". I happen just now to be writing a paper on such valleys and should be much obliged if you could refer me to any work describing them. The only ones I know ^{in Australia} are the Grose & the Cox River valleys, described [2] in Major Mitchell’s³ Explorations in Eastern Australia,⁴ but he says nothing about the rivers anywhere running underground, which I believe they have been long since accessible & occupied by farms.

References to any accounts of rock-walled & primitive inaccessible valleys will be very acceptable.

Believe me | yours very faithfully | Alfred R. Wallace [signature]