The Boarding House

The building at 19 Gramercy Park is the boarding house where Si stays on his third visit to the past, is where he meets Julia and Jake, and serves as the location for several of Si's comic but potentially disruptive slip ups, referring to incidents in his present that have yet to occur in the world of the past. Because the building also exists in the present, but in mostly changed form, it represents another facet of the novel's theme, relating to the way that the past can continue in the present, but in altered form.