Thanks Jonathan. OK here's a prioritized list (hopefully not all to be done by John:-).

1) Update above hotlink labels (the text, not the URLs) as follows

a) 30-59: add 2 (so e.g. "Exercise 30 - ...) becomes "Exercise 32 - ...)

b) 65 & 72-97: add 5

c) 67: change to 66

2) Add hotlinks pointing to Ex. 65 (discussion exists, correctly titled), 9 (no existing discussion), & 76 (ditto)

3) Update existing discussion titles to match labels updated in step 1)

a) except 32-37, 41-50, 54-56, 61, 70 which are correct now

4) *Content* of the following exercises seems off from that in revised text: 4, 28, 41, 50, 66, 77, 87, 92

a) most deltas are just xref numbering & poset terminology

b) a couple may require judgement (as the Comments may become confusing)