George Henry Gibbs was one of the early promoters and director of the GWR.
GREAT WESTERN RAILWAY 'EXTRACTS FROM THE DIARY OF GEORGE HENRY GIBBS' 1910ish
London Midland & Scottish Railway - Extracts From The Code of Rules - 1933
book The Birth of the Great Western Railway: Extracts from George Henry Gibbs
British Railways Extracts from Working Instruction for AC Electrified Lines 1967
Extracts from Rule Book British Railways 1950 Booklet 1st January 1950