The Doctor's House is the residence and office of the Doctor in San Francisco. It seems that nearby buildings have been demolished.
[Dragon 2-2|Two]] members of the Dragon Clan rescued a slave from the Transamerica Pyramid. They took him to the Doctor to recover. While he was treating the slave, Phil Cook and a Ratman came to his house, killed both him and the slave.
The Manhunter arrived later and found the dead bodies. Before leaving he filled the Empty Flask with some urine sample and took a Letter from his pocket.
Behind the scenes[]
The house seems to be a victorian building in the Russian Hill–Macondray Lane District. Specifically it resembles an actual building found at the conjunction of Taylor Street and Macondray Lane (Wikipedia link).