Letter from Joseph Prestwich, to Walter White, regarding a paper 'On the origin of the parallel roads of Lochaber and their bearing on other phenomena of the glacial period' by Joseph Prestwich Apologises that editing the paper for printing has taken longer than expected. Disagrees with the suggestion to omit figure three. Has reduced in scale some of the other figures. Asks if the President could allow him to substitute a new figure for one already in the paper. Subject: Geology [Published in the Philosophical Transactions of the Royal Society, 1879] 30 July 1879