July 22. 1834.
Professor Bonnycastle is desirous of obtaining your opinion on an improvement he has thought of in canals and on some points connected with our school of Civil engineering. Being a stranger to you he has asked from me a line of introduction I give it with pleasure as due to his personal merits as well as to his high scientific reputation. I offer no apology therefore for the liberty I take praying you only to be assured of my esteem & cordial regards—
FC (DLC). Misendorsed McComb.