I've been meaning to bring this up - notice anything unusual about this list? Out of the 10 families living in the apt house/building, there are 4 married women without their husbands. This just wasn't done back in those days. Also, Mary wasn't listed but Joseph was. None of the residents have a spouse or other family member listed. In other years and directories, all adults along with their occupation are listed so why not this one?
Considering there were also at least a couple children living there, that's a boatload of people living in what was supposed to hold only 4 apartments. Fine, some may be roommates but if Mary is missing then we can assume others are also not listed. Too many inconsistencies and questions.
That was student housing. Private housing for students. Plus you don’t know the husbands were not living there.