In the 1940 census, Robert W. Logan was living in Queens, NY with his wife Eugenia. [Robert Logan was born 13 Dec 1906 in Iowa].
https://www.familysearch.org/ark:/61903/3:1:3QS7-L9MB-M3BQ?i=23&cc=2000219From that census we know that Eugenia was born in New York in about 1905; her father was born in Sweden, her mother in NY; she had been previously married at the age of 21; as of 1940, she had no children; she had 4 years of college; she was not employed; she did not have a social security number. She probably married Robert Logan before 1935, since they both reported the same residence location for 1935.
I looked for someone named Eugenia born in NY in about 1905 with a father from Sweden and a mother from NY. I only located one who fit the bill: Anna Mabel Eugenia Johnson, born 24 September 1904 in Brooklyn.
https://www.familysearch.org/ark:/61903/1:1:2WHT-TRMAnna Mabel Eugenia Johnson did, in fact, get married in 1926 at the age of 21. She married Andrew Burnet Stoney in Manhattan.
https://www.familysearch.org/ark:/61903/1:1:247G-ZQ2In 1930, Andrew Stoney and his wife were living in South Carolina. She was using the name Eugenia and she had no children.
https://www.familysearch.org/ark:/61903/3:1:33S7-9R8Q-6LW?i=23&cc=1810731By 1940, Andrew Stoney had a new wife so either Eugenia had died or they had gotten divorced.
https://www.familysearch.org/ark:/61903/3:1:3QS7-89MB-Y6NN?i=20&cc=2000219I haven't found any death or divorce record. I suspect this Eugenia might be Robert Logan's wife but I can't find any marriage record for them, either. Nor have I found a death record for Eugenia Logan. [Robert Logan died in 1978 per the SSDI; last residence New York, NY].
https://www.familysearch.org/ark:/61903/1:1:JRQS-SQQCan anyone find a marriage record for Robert W. Logan and Eugenia Johnson/Stoney or any other plausible Eugenia?