Dear Ms. Hackett,
Thank you for submitting your materials to ______ for review. I am most appreciative of the quality and seriousness of your work. Regretfully, we find that it is not a good fit with our contemporary program. I wish you the very best with your future endeavors.
Director of Contemporary Art
Blah Blah Blah
****Addendum: I should add that the perplexing issue is one of being a good fit for their "contemporary" program. Perhaps I need to ditch the late 19th century props and add some more buzzwords to my statement again. Or go back to abstraction. There's always that. Contemporary. Jeesh. Like what- as opposed to an anachronistic program?