A SECOND edition has been published of The Book of Flags (Oxford Univer- sity Press, 155.), by Vice-Admiral Gordon Campbell, V.C., D.S.O., and Mr. I. O. Evans, F.R.G.S., which was first published in 1950 and reviewed in The Life-boat for Autumn 1951. The Institution's house-flag is described and reproduced in colours. It shows the care with which the book has been revised for its second edition that the review pointed out that the flag is flown not only on the Institution's headquarters in London, but on its depot at Boreham Wood, and this has now been added. There are other alterations and additions in the new edition. The chief addition is to the section on Air Flags, which has now been expanded into a chapter..