Here is some information about George Cortelyou, McKinley’s White House Secretary. George Cortelyou was also the grandfather of George Bechtel, whose collection of McKinleyana makes up a large amount of the collection at the National McKinley Birthplace Museum. http://blog.whitehousehistory.org/history/a-place-of-peace-george-cortelyou-and-the-early-20th-century-white-house/