Wednesday, 18th—The four companies of cavalry that accompanied us up the river (also by boat) went on a scouting expedition yesterday toward the town of Glasgow. They captured and brought in this morning one hundred and fifty-five kegs of powder which they found hid in haystacks. We stored the powder in the hull of our boat, and at 2 p. m. left this place for an all-night run on our return to Jefferson City. But we are quite uneasy for fear of an explosion from our cargo of powder.