every one is individual.
I am struck by how some people on here are confidently stating what an unknown person would/not like.
do not go to see her if she specifically wants to be alone.
as for gifts, maybe a Fortnum and masons hamper or similar if you can afford it, to be delivered.
a good and varied selection of crackers for late night nibbling. some mixed tipples maybe, depending on taste.
,gin n tonic in little cans.
photos can be tricky.
maybe a nice notecard/ writing set, with a good supply of stamps, and pens, if she still writes to people.
a nice diary. sketching book and pencils. crafty things to do.
perhaps a journal subscription, with current issue, national geographic, if she likes that kind of thing, and reads. that one is good as varied content with many stunning pictures.
similar browse-able coffee-table books.
good luck to you all. be led by her.