London’s Alleys: Green Dale, SE5

This is a long sloping passage in Denmark Hill that existed before the housing around it and was originally called Green Lane. Originally, it linked two large houses at the northern end, Hill Lodge and the Pelican House girl’s college, to Dulwich via Henry Bessemer’s Observatory.Henry Bessemer was an English inventor whose steel-making process became the most important technique for making steel in the nineteenth century. He owned a home in Denmark Hill, where he continued inventing