[Jerome Betts]

I've run across this when seeking permission to use images to illustrate articles, Ann. As far as I remember the 70 year rule applies, i.e. in the UK copyright remains with the artist's heirs or whoever acquired the rights until 70 years after the artist's death. The copyright may have passed to a publishing company, as I found on one occasion, when asking permission to use book illustrations 68 years after the artist's death despite my owning a copy of the book. Copyright can be sold, of course, but it doesn't sound as if there was a specific agreement about this with the art student. In practice, as WFL says, I would imagine a proper credit and the chance to have work on display to the book-buying public would be more than enough compensation if she still owns the copyright.