Peter I would check ships records from 1874 to 1876 leaving a port in America, possibly Pennsylvania, during these years heading back to England. If Emma was born in Pa in 1874 and her sibling was born in England in 1876 it narrows the time frame in the US.Perhaps her full place of birth would be given on the records. Although I have had no experience in this area particularly perhaps since she would retain a duel citizenship you may find records in England that gives full place of birth in order to locate birth records for the correct county in Pennsylvania.Below is some information on Arthur and Julia. Kassie Arthur and Julia Underwood arrived in New York 1872. Name: Julia Underwood Arrival Date: 30 Sep 1872 Age: 20 Gender: Female Port of Departure: Liverpool, England Destination: United States of America Place of Origin: England Ship Name: City Of Brussels Port of Arrival: New York Line: 47 Microfilm Roll: 366 List Number: 1070 Name: Arthur Underwood Arrival Date: 30 Sep 1872 Age: 22 Gender: Male Port of Departure: Liverpool, England Destination: United States of America Place of Origin: England Ship Name: City Of Brussels Port of Arrival: New York Line: 46 Microfilm Roll: 366 List Number: 1070 1881 England Census A. Underwood abt 1851 Wolverh/ton, Staffordshire, England Head Wolstanton - Chesterton Agness Underwood abt 1879 Chesterton, Staffordshire, England Daughter Wolstanton - Chesterton Clara Underwood abt 1880 Chesterton, Staffordshire, England Daughter Wolstanton - Chesterton Emma Underwood abt 1874 State Of Pensylvania Daughter Wolstanton - Chesterton Ethel Underwood abt 1877 Chesterton, Staffordshire, England Daughter Wolstanton - Chesterton F. Underwood abt 1876 Chesterton, Staffordshire, England Daughter Wolstanton - Chesterton Julia Underwood abt 1853 Hanley, Staffordshire, England Wife Wolstanton - Chesterton