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Page 40. " Sebastian lived at Christ Church, high in Meadow Buildings "
The Meadow Building, Christ Church
GNU Free Documentation LicenseThe Meadow Building, Christ Church - Credit: Bernard Gagnon, Wikimedia Commons

The Meadow Building is that part of Christ Church College which overlooks Christ Church Meadow.

Interestingly, in view of Sebastian's aristocratic pedigree, it was not considered a fashionable part of the college in which to be accommodated.