Incidentally there is a Beauford Delaney works on paper exhibition currently at The Drawing Center here in NYC. A link to the exhibition is here: drawingcenter.org/exhibitions/...

Please feel free to email me at zr@michaelrosenfeld.com - we work with several excellent paper conservators

Hello Rebecca - I'm Zachary Ross and I work for Michael Rosenfeld Gallery in New York. The gallery represents the Estate of Beauford Delaney and we have handled his work for more than thirty years. It is possible that we could help you with the condition of your pastel portrait of your father.