One writer, Thomas Henry, said the U. S. Treasury Department was "the real birthplace of professional base ball in Washington." As a source of patronage for good players, this department was widely exploited after the Civil War. In addition, Washington players benefited from the collection plates passed at games. By this kind of enterprise Washington clubs were able to keep a cadre of good players and to offer excellent accommodations. In 1867 the Nationals' park was located on a field four hundred feet square, surrounded by a ten foot fence, and shaded on the north side by roofed stands. To discourage gamblers, a sign which read "Betting Positively Prohibited" was posted.