Yes, I am another descendent of William Morrow. My father Kempton actually corresponded with your aunt from 1967-1995(?) and I have inherited the letters she wrote to him, Nellie Cooke's manuscript, and the John L. Acheson manuscript, both of which she copied for us. I am sorry to hear of her illness and recent passing.I never had the pleasure of her acquaintence, but she seemed to me to be aremarkable person. I am so happy that her genealogical material went to someone in the family who is as interested as she was.
I have been in contact with Jim in California and know that he would be very interested in the project of making the Acheson information available to all online( as well as any trips to Ohio for further information).You two should get together so that you can cover twice the ground. I would be interested in any pictures of the Morrow siblings and the Tannehill family information among other things. I think your aunt gave my father xerox copies, but properly scanned digital images would be of much better quality.
Hope you will get in touch so we can discuss Achesons (and any other relatives we have in common).You can get my e-mail address from Jim.