I enclose a specimen of P. cerasifera (Willd.) from Gundacker's formerly Matlack's Garden.

To Zaccheus Collins, Esq., Philadelphia.

[The letters of those identified with the early history of botany and horticulture in our country are extremely interesting. We find in the above that there was as much trouble about the native Plum among the early botanists, as among the fruit growers of the present day. John Lyon was an English nurseryman of much intelligence, and greatly esteemed by the botanists of Pennsylvania. In July, 1814, he left Philadelphia on a long journey of exploration for seeds and plants into Virginia and over the mountains into Tennessee, thence into North Carolina. The journey, which was performed on horse-back, was very arduous. He was taken ill in Tennessee, and died at Ashville, N. C, early in September. The other names mentioned in the letter are all well known in the history of botanical science, and one of them (Dr. Bigelow) still survives. - Ed.]