Further alterations were made discreetly by Spencer and not made aware to Trevor, such as access to a mine hidden behind a garden feature. The designs changed several times, leading to several months of delays from its original start date of 21 March 1962, with construction beginning under a new firm recommended by Spencer sometime after 5 July. When designing the mansion he drew interior inspiration from Lord Spencer's summer home in Europe. The mansion was the brainchild of New York architect George Trevor, famous for his convention-breaking designs, such as labyrinthine floorplans and elaborate traps and locking mechanisms. Due to the restrictions imposed on the region by the US military and the CDC, no attempts since 1998 have been made to investigate the ruins. police force was sent in to destroy the facility during a police investigation of the area, accomplishing their mission on 25 July. The facility was deemed lost in July after several attacks in the forest reached national headlines, and to cover-up the research the Umbrella-funded S.T.A.R.S. In May 1998 the mansion was contaminated by an outbreak of t-Virus, the mind-altering effects of which led to a deterioration of authority as cannibalistic murders, animal attacks and shootings became commonplace. Although officially serving as a country club for Umbrella Corporation executives and distinguished clientele, actual guests were rare if at all existent, and the mansion was primarily used as office space for the underground Arklay Laboratory complex, a top-secret facility used for the clandestine bioweapons research known to The Pentagon, with the mansion serving as a façade to hide the shipments of personnel and equipment in plain site. It was designed by George Trevor of Trevor & Chamberlain fame and completed in November 1967.

The Spencer Mansion was mansion in Arklay County, United States, several miles northwest of Raccoon City within Raccoon Forest.

Resident Evil: The Umbrella Chronicles (2007).

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