Hi Kevin, A Sabel H. Rossiter was living in Ketchikan, First Judicial District., Alaska in 1920 with the Elswick family. She was b. abt. 1887 in Canada and single. Both parents born in England.
A Harriet Rossiter was living in Ketchikan, First Jud. Dist., Alaska in 1930. She was single and born in the USA abt. 1889. Both parents were born in the USA.
An Isabelle Rossiter was living in Ketchikan in 1930. She was single and born in Canada abt. 1890 and immigrated to the USA in 1894. Her father was born in England and her mother in Scotland.
I don't think "broadcast" approach will be helpful because you don't know if the people found are part of your family or not. Always start with what you know; parents or grandparents and work backwards through the years. Successful Searching!