The full reference to the book I mentioned above is:
WARN, Faith: Bitter Sea: the real story of Greek Sponge Diving. Guardian Angel Press, 2000. isbn 0-9538088-0-7 £5-50 (PO Box 5883 CM3 5AH).
My copy is signed both by the author and also by our friend Irene whose mother, as a young woman, appears in the photograph of Kalymnian women waving goodbye to the fleet following Chapter 12.

RtS