Making some final edits based on scattered backslashes and comparison with the original printout. These are some issues that I'll have to hand back to PC:

• Epsilon + backslash should be converted into epsilon with psili and perispomeni, but no such composed character exists; I have found evidence that there is a proposal to make that character 0x1f16, part of the Greek Extended, but in Character Map that codepoint shows as "unassigned" -- although it's clearly in the right place, coming at the end of a run of epsilon + diacritic combinations. The Unicode 5.1 code chart shows it as "reserved". I have represented the character using 0x1f10 (epsilon with psili) + 0x0342 (combining perispomeni). This doesn't look very good in Gentium, though. There are three instances of this character. Here's the character itself: ἐ͂
• There were several instances of combining diacritics (ypogegrammeni) being placed after the period instead of before, when they're intended to combine with the final letter before the period. The ypogegrammeni is usually a forward slash, so the sequence char + period + forward slash should be char with ypogegrammeni + period. Instances of this occur with sigma and iota, and in both these cases the results (created by adding the combining ypogegrammeni (0x0345) to the character) look a bit ugly.
• This English bit has a trailing slash, which looks odd, but also appears in the original printout, so I've left it alone:

  For the voice when it is 'seized':
  The juice of cabbage and honey; give him it to drink in the bath and he gets well/

  It appears just after [71].
• Page 67 has English, but ends with one line of Greek that looks like it should be on the next page. Similarly p. 81, p. 83, p. 95, p. 99, p. 111.
• Page 60 begins with one line of English which I think belongs on the preceding page. Similarly p.62, p. 92, p. 102.
• In the contents pages (starting on p. 114), numbers in the right column don't always line up.
• Page 116 has a footnote that wraps onto the next page. Similarly p. 119, p. 122, p. 127.