"Pausing on the North Gate bridge, she looked down into the dark canal water, on to which the last shivering autumnal leaves were slowly fluttering down. She thought of the girl—of Number Twenty-seven—who had tried to drown herself in those greenish, slimy waters" (Chapter 21). 

Residence in Portman Square where Alison passed away because of illness. It was also where Mary's life seems to come to an end too- as Vincent became married and ultimately have to lead a life alone.