“Mystic Hall Seminary for Young Ladies” (right column page 7) sounds like it would prepare the young ladies for higher studies in sorcery, perhaps in Europe, but advertises “Horseback riding and salt-water bathing.”
According to “Medford (MA) in the Victorian Era,” the school opened in 1855 and moved to Washington, D.C., in 1879. Thus, if you sent your daughter there in the fall of 1857, she would get only two years, at most, of the salt-water bathing and moderate climate of Medford before having either to change schools or to move to sweltering, disease-ridding Washington, just in time for some war or other that might happen.
They weren’t making it easy for parents in the 1850s, either!
Parents couldn’t even google their kid’s prospective schools. They had nothing to go on but a half inch ad and word of mouth.