If you are so taken with the handwriting then you will no doubt wish to
reproduce it as faithfully as possible. This being so, you will need
to see the shape of the remaining letters and this is only possible by
approaching the person herself. On the other hand, if what you have seen
is sufficient to inspire you into creating a fount _based_ on the hand-
writing, then I personally don't see why a question of copyright should
be an issue. Out of common courtesy however, and as you know of the
identity of the person who has inspired you, it would polite to say the
least, to make some approach.
If you are still very unsure, I'm sure there is plenty legal advice
available not too far away.
EB @ UCC