The other day, having a leisure hour at my disposal, I stepped into a new museum, to which my notice was casually drawn by a small and unobtrusive sign: "TO BE SEEN HERE, A VIRTUOSO'S COLLECTION." Such was the simple yet not altogether unpromising announcement that turned my steps aside for a little while from the sunny sidewalk of our principal thoroughfare. Mounting a sombre staircase, I pushed open a door at its summit, and found myself in the presence of a person, who mentioned the moderate sum that would entitle me to admittance. "Three shillings, Massachusetts tenor," said he. "No, I mean half a dollar, as you reckon in these days."