Referee's report by James Challis, on a paper 'On the deflection of the plumb-line at Arthur's seat, and the mean specific gravity of the earth' by Colonel H James Recommended for publication in Philosophical Transactions. It is of accurate and scientific character. The point that the author referred to in the enclosed papers should receive consideration. Subject: Astronomy [Published in Philosophical Transactions, 1856]. 7 April 1856