Bartley, James Avis. Lays of ancient Virginia, and other poems by James Avis Bartley. (1855) WAM-PS-0008.Image_1.011813

The name "J. P. Grayson" is written in a variation of pigpen cipher (see https://crypto.interactive-maths.com/pigpen-cipher.html), where A = _| and B = _*| and C = |_| and D = |_*| and so on.