This post office preserves the otherwise vanished name of a late-19th-century real estate development that was long ago swallowed by the neighborhood of Borough Park. In its day, Blythebourne was billed as "a model suburban village . . . [with] 40 different styles of cottages," an appealing alternative to that era's overcrowded tenements, whose "physical and moral evils have been deprecated by political economists, reformers, and philanthropists alike."