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Ruth Floyd showing as aged 38 on the manifest of SS John which left Southampton, England for New York on 16 Oct 1939.
Her nationality is showing as American and returning to the US.
Her address on the shipping manifest in England was 2 Valley Road, Crayford which is in Kent.
The 1939 register taken on 29 September 1939, so just a few weeks before she left England. She is showing at this address, 2 Valley Road, Crayford with husband Arthur J N Floyd, a fitter by occupation. She looks to have the middle initial of A and her birth date 27 March 1901.
Now, the 1939 register shows her as a housewife, the manifest as a model. I can't see marital status on the manifest. There is also a line through her entry on the manifest. Did she actually travel on that crossing?
Have you found her on the US 1940 census? As Girl Guide asks, what else do you have on her? If this is her in England in 1939, Floyd would look to be her married name not maiden surname.
Monica