Something that should be considered when looking at these two maps is the Introduction and Preface to Martin Gilbert's book.
The Introduction was written by Field-Marshal Montgomery back in 1970.
Quote:
The idea of teaching history by a series of maps was new to me until Martin Gilbert's historical atlas of British history had come my way. I was at once intensely interested and later studied those of other countries and nations which he published. Such historical facts cannot fail to be of real value to students in schools and universities; they would look through a window, as it were, at the subject before getting down to a details study-which is, of course, essential.
The Preface is written by Martin Gilbert in which he states the following.
Quote:
The principal books upon which I have drawn for both facts and ideas are listed in the bibliography at the end of the volume.