Thomas H. Mumford writes to Thoreau:
Please send us ten pound of Plumbago for Electrotyping purposes, such as we got last from you—as it is some risk to send the money by mail, we would prefer paying the Express agent on delivery of the box—I suppose this arrangement will be satisfactory to you but if not please let us know at once as we have but a very little on hand.
Respectfully Yours &c
Tho. H. Mumford