For a partial scan of the book referenced in the notes including the pages referenced by Merton, see also: https://merton.bellarmine.edu/s/Merton/item/42896.

For references to this book in Merton's journals, see also: http://merton.org/Research/Quotations/results-b.asp?phrase="White+masks".

A finding aid for the collection is available, Index of Thomas Merton's Reading Notebooks, Sub-Section C.1.