In ascending the Potomac one night, while anchored, a negro song was wafted in the stillness of the atmosphere.

I could distinctly hear the following words:-- Gentlemen, he come from de Maryland shore, See how massa gray mare go.
Go, gray, go, Go, gray, go; See how massa gray mare go.
I reached Washington late in March, and sent in my geological report on the 2d of April.

Mr.Calhoun, who acknowledged it on the 6th, referred it to the Topographical Bureau.

Some question, connected with the establishment of an agency in Florida, complicated my matter.

Otherwise it appeared to be a mere question of time.