SummaryCaption: "Only the costumes change--In 1872, when th[is] sketch was made, Brooklyn Sunday School students marched in Prospect Park in the 43d Anniversary Day Parade to celebrate the founding of the Brooklyn Sunday School Union. The long dresses are a little longer and the fall hats a little taller, but there doesn't seem to be a great difference from Thursday's celebration, when close to 100,000 youngsters will march in the 121st annual Anniversaty Day Parade."