Sylvia, I looked through all my books and didn't find one Drysdale listed! That surprised me.
My suggestion is that you write to the Montgomery Co. courthouse and ask if they have a will and/or probate for any Drysdales between 1830-1840 and see if you can get a copy of it. Another thing you might try is looking for any Drysdale land or deed transactions in Montgomery Co. Maybe the father of Calvin deeded some land to him?
Montgomery Co. PO Box 414 Mount Sterling, KY 40353 606-498-8700
I wish I could have helped you out. Good Luck. Marilyn