Yes, Jersey City is right across the Hudson River from New York City (Manhattan) - easily accessible in 1931 (and today) by ferry, PATH train (i.e. subway/tube), and by automobile via the Holland Tunnel.
I checked the census for Hudson County, New Jersey (Jersey City is there), and found only two EMMETs - and no R. EMMETs. Perhaps someone with Ancestry could find some more - and add another "t" to the surname, just to be safe.
Do you think your EMMET could have been an attorney, or is that my own private tangent?