"Timbromanie, by P.S.", in the Springfield Republican, Springfield, Mass., June 22, 1864.

Reprinted in the United States Mail and Post Office Assistant, Sep. 1864, and reprinted from there in The Chronicle of the U.S. Classic Postal Issues, 1974, vol. 26, no. 3, whole no. 83, p. 134-137.  http://chronicle.uspcs.org/PDF/Chronicle_83/18563.pdf

The author was Lyman Hotchkiss Bagg, 1846-1911, who went on to be a frequent contributor to the Stamp Collector's Magazine.  A hand-written version of the article (draft? original? copy?) is in Bagg's memorabilia at Yale University.

An excerpt:

The next paragraph quotes from The Stamp Collector's Magazine, May 1, 1864, p. 80.

Further: