My ancestor Lovisa Sofia Hemlin was born 11 march 1826 in Svedvi parish Sweden. Her son Viktor Mathias Hemlin, born 7 march 1863 Kolbäck parish Sweden, went to Philadelphia, Pa. He started his journey in 1883. Three years later, 27 august 1886, his mother also moves to the United States. Despite finding the two in the Swedish emigrant lists I cannot find them in the USA. What am I doing wrong? Where should I look?