The Lewis Girls and Mom: Elusive in Two Census Counts

1940 US CensusMy mother's first cousin Eugene Albert Schwartz (1916-1983) married Dorothy Lewis (1919-1989) on Christmas Day, 1940. Constructing a timeline, I was recently tracing Dorothy, two sisters, and their widowed mother Mildred Weinberg Lewis back from Dorothy's marriage and forward from Dorothy's birth on December 12, 1919. For Dorothy, I had:Bronx birth certificate index (digitized original not yet available on New York City Municipal Archives site)1920 US Census1925 New York State Census1940 marriage in New York City, Dec 251950 US Census1989 obit in Arizona Republic newspaperFind a Grave memorial site with photo of gravestoneInfo from Eugene's and Dorothy's grandchildren about family life and their retirement to Sun City West, covering later years up to the 1980sHey, where was Dorothy in the 1930 and 1940 US Census? Ancestry didn't find her or her mother and sisters in either of those two Census years. I tried a few different ways to search, but no joy. I wanted to fill out…