Walker retired to his own G.H. Walker & Co. This left the Harriman brothers, his son-in-law Prescott Bush and Thatcher M. Brown as senior partners of the new firm of Brown Brothers Harriman & Co. The firm's London branch continued operating under its historic name Brown, Shipley & Co.
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The USGA's Walker Cup (the famous biennial golf match) acquired Walker's namesake for his role in the event's creation.
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