Frederic Tudor, later known as Boston’s “Ice King,” made a fortune by harvesting ice from freshwater sources in Massachusetts, including Fresh Pond and Spy Pond, and shipping it to India. Due to Tudor’s successful enterprise, ice became a valuable commodity, and maps were needed to indicate property lines between owners. Tudor’s company built three ice houses – in Bombay, Calcutta, and Madras – to store its cargo once it reached India. The Madras ice house, built in 1842, still exists in Chennai.