I've located that Emma Blomqvist (born 1902 in Borås, Sweden) emigrated from Gothenburg to New York in 1920. The last trace of her is from Ellis Island (30 May 1920), she was set to look up her sister - Ingeborg Blomqvist, later Anderson, who lived in Woodhave, NY at this time. Emma arrived too late for the 1920 census and probably got married and changed her surname, making her really hard to find in the 1930 census. Any ideas? She probably stayed in the New York/Jersey area.