C. It's altogether unbelievable that -somewhere- amongst the prewar marriage, drivers license, passport and school records (Hella Poch was a noted member of two archaeological societies associated with a given university for which she wrote numerous articles) that there is no remaining 'staff' photos. The same can be said for George Anton Poch who, though not as proliferous, was at least published and as Levenda himself suggests, the likelihood that there is a traceable line of evidence through the family name itself is high because there are NOT many such 'Pochs' among Austrians. At the least, there should be a full court press to go through whatever family (geneaological) records and momentos that might exist among the known family so that Hella aka 'Gerda' Poch could be compared with Sosrohusodo's recollections while he is still available to make the comparison.
D. Finally, Dr. Poch would have signed numerous memos, authorizations and similar material while serving as 'Chief Medical Officer' of a hospital which he ran. There should be, in the hospital records, some compareable set of handwriting that can be matched to the samples of Hitler's that we know of. Even if the original diary is now no longer accessible in the hands of an Indonesian prince or what have you.