http://books.google.co.uk/books?id=CNsRN9L5BYsC&pg=RA4-PA219&lpg=RA4-PA219&dq=john+hartle+mv+six+photograph&source=bl&ots=P8AVzOo3q2&sig=BXI_yw4QvIKysWk3FSL_MED2Pp4&hl=#v=onepage&q&f=false
