This nicolas Erbach referred to as a boatman is not your nicolas, This nicolas married Catherine ditmarr, and is referred to Immigrant bank records for William Erbach (3 records 2 found using erbach, 1 found using ebeck. This nicolas is found in NYC city directories at the nyc address on grand street and later on lewis, in 1862 he died. and in 1865 his wife is found in city directory as a widow of nicolas. The city directories are on footnote.com, This nicolas is found with william's children in 1860 census at 34 lewis street, using the search for ebett under ancestry, the name is ebbett on the census form. (the census taker recorded the name that way). The place of origin is on census form. (Koblenz), I have the church records for koblenz for William's baptism, as well as the marriage record for nicolas. This family is related to the Lackacwana/Scranton PA Erbach's who are decendants of the brothers of nicolas as they are found in koblenz records as well. Nicolas was born abt 1799 and married Catherine dittmar in 1823, and had 1 child in 1823, Wilhelmus. Wilhelm married Maria Catherina Schaller (also found in koblenz baptismal records), and had 3 children, anna in 1849 in germany, one who was born in NY oct 1851 and died before 1860 and Richard Wilhelm who was born in dec 1853. The immigrant bank record states that William and Catherine arrived in 1850 and in aug 1852 the parents one child anna was still in germany, and the other child was 10 months old. In sep 1852 Nicolas arrived aboard the Isaac Webb with his wife Catherine Dittmar and william's daughter ann.