My great grandfather Peter Anderson was born 21 dec 1886 Stora Kils parish,county Warmland,Sweden, His parents were Anders Magnusson and Anna-lisa Karlsson. He was baptised as Petrus Andersson. He immigrated to US 2 nov 1906 with ss United States and changed name to PETER ANDERSON. He was on his way to Chicago Il. according to immigration records. From his correspondance whe know that he was unaware of his girlfriend´s pregnancy with my grandfather. He was then working in Il. and MI. in the forestry industry to raise money so he could send for them. There is a lot of letters and photos. His last letter home in 1917 says that he is working as a manager for METROPOLITAN WINDOW SHADE co Seattle Washington, but now he is going to France. He wishes his girlfriend and his son Johnny happiness with their "new" family and disappears from history. Johnny recieved the letters when he was grown up together with the knowledge of his real father. Johnny died without knowing what happened to him. Would be grateful for any clues, hints and tips.