Protection of the municipal drinking water that the Water Works pumped was the impetus for the purchase of lands along the Schuylkill that later became Fairmount Park, one of the world's largest municipal park systems. Charles Dickens listed the Water Works as one of the two things he particularly wanted to see while in Philadelphia. The other was Eastern State Penitentiary, less than half a mile away on Fairmount Avenue. The prison opened in 1829, the first prison in the country built specifically with the intention of reforming rather than simply punishing criminals. The prison's hub-and-spoke layout was also a first, and became the model for hundreds of prisons around the world (it was often called the "Pennsylvania Model"). Its unique system of solitary confinement for all prisoners did not, however. Intended to provide prisoners relief from the overcrowding and squalor of other prisons and give them time to reflect on their crimes, it led instead to intense despair and sometimes insanity among the inmates and was roundly condemned by Dickens when he visited. In 1831, these two innovative institutions were joined by a third: Girard College. This school was founded in accordance with the will of Stephen Girard, possibly the wealthiest man in America at the time of his death. Himself an orphan, he wanted to create a model institution for educating poor orphaned white boys at a time when universal public education did not yet exist. The executor of Girard's estate was another prominent and wealthy Philadelphian, Nicholas Biddle, former US Secretary of the Treasury, who commissioned the building of Founders Hall in honor of Girard. The Hall is the first example of true Greek Revival architecture in the United States and is, like both the Water Works and Eastern State Penitentiary, a National Historic Landmark. In 1968 Girard College entered the nation's awareness again when the United States Supreme Court altered Girard's will by striking the words "poor, male, white, orphan" and set a major precedent for equal access to education for all Americans. These three institutions were built when Fairmount was still a rural suburban district of Philadelphia. Beginning in the 1830s, the city itself began to grow beyond its original boundaries, and a mixture of homes and factories sprang up on the district's southern fringes. The Baldwin Locomotive Works, the nation's largest maker of locomotive engines, was located on the southeastern edge of the future