In his "Notes on Air Fighting" Dallas says: "These are extracts from a larger book now in print. The extracts will be modified as time permits."
This particular copy is dated April 1918 (When he was in command of 40 Sqn).
In Sept 17 (when he was in command of 1 Naval) he wrote in a letter home: "I have written a small book on aerial fighting tactics for the Navy but of course it is a service book"
One or two books ?
And is anyone aware of the existence of any of them ?
cheers