In the 1920 census for Suffolk Co., I have Vunck, Mary E. age 47 born 1873 England
Electra 9 Gloria 5, born April 27, 1914
I'm asuming this is your family, and Arthur has died. Arthur is listed in the 1900 census as a boarder in Brooklyn, born Dec. 1875 in NJ. Did he have a brother Perry? Who was his father?
Also, you never told me who the "Dutch guys" are that you spoke to- I'm dying of curiosity.