Marienfeld; a pioneer among camps was established by Dr. Henderson in the summer of 1896 in Milford, Pennsylvania, and was moved to Chesham, New Hampshire in 1899 and operated into the 1950s.
Although Dewey grew greatly in stature, Henderson was highly regarded and spent his career implementing reform.
He was a prolific author who wrote about progressive education, manual training for boys, the value of hand work and the benefits of summer camps.
Dr. Henderson's reputation rests largely on his academic papers published in periodicals such as Popular Science, Harper's Magazine, the Atlantic Monthly and the North American Review.
[1] In retirement he designed and maintained a summer home in the Arts and Crafts style in the artist’s colony of Tryon, North Carolina.