By D. L. Beetson.

In May last it happened to be my fate to be attached as assistant to an exploring expedition, the original programme being, I believe, that we were to visit the Ruby Fields, returning via Western MacDonnell, round Lake Amadeus, and thence through the Musgrave Ranges to Charlotte Waters. One of the principal objects of the expedition was the obtaining of reliable information from a competent authority as to the geological formation of that portion of Central Australia. Mr. J. J. East accompanied the party as geologist, and to that gentleman I am indebted for much useful and interesting information that I could not otherwise have acquired.