The John Spicer company, a factory actually, was located in Brooklyn. It started in 1888, and this catalog dates to around 1915, I believe. The Halloween "body dresses" were made of worsted wool.
John Spicer catalog circa 1915 Collection Jim Linderman
See also the books below by Jim Linderman
ECCENTRIC FOLK ART DRAWINGS OF THE 19TH AND 20TH CENTURIES
THE BIRTH OF ROCK AND ROLL