Happened upon a pic of Reathel Odum, Mrs. Truman’s personal secretary, at her desk in what is today the Beauty Salon–a real find. Looking a little deeper, I came across a transcript of an interview with her in 1988 where she talks about her room and office in the White House. She also mentions an incident with Ed McKim from the West Wing staff and, because I was also searching for info on the location of his office, I happened on an explanation in an interview with General Harry Vaughan: McKim had been tasked with cutting corners and in doing so stepped on a lot of toes all over the WH.
Article on Odum’s passing in July.
The Elliptical Saloon 
You may want to check out the caption under the Tricia Nixon as a bride photo.
Got it–Thanks!