Before the area swelled with galleries and high-end residences, it was an artery supplying the heart of New York with warehouses and manufacturers. By the 1840s it had been established as a mixture of working-class residences and industrial complexes.¹ To serve the factories, freight lines were required, running up and down Tenth and Eleventh avenue. The legacy of these tracks forever shaped Chelsea’s development. Naturally, the one-block long trains running by pedestrians were a massive safety hazard. Horseback riders, called the West Side Cowboys, were required to warn pedestrians of oncoming trains.² The 1929 West Side Improvement Project finally moved the rail above street level, laying the tracks for the High Line we know today.