PG #1, Peter John Graham, b.1939, Francophile, cook, etc.
PG #2, 1878-1961, mountain guide.
PG#3 is probably a Scots artist, b.Glasgow, 1959.
PG #4, PhD., Senior Lecturer in the Dept. of Architecture, University of New South Wales.
Behind the First Wall is a novel about WW2 published in 1946 so is likely to be by yet another PG, as is the Guide to business travel published in the 1980s
PG#5 New Zealand Crime writer