6/27/1870 St Louis, St Louis Co, MO. Listed as Erastus by the census taker, he was a wealthy man with property valued at $10,000/250. He was a boiler inspector, probably on the railroad. His age was 52 and Martha was 38. Both of Erasmus' children from the first marriage were there, George, 16, and Emma, 10.
11/8/1880 St Louis, MO. That census was apparently counted twice. In the first enumeration, Erasmus was a mechanical engineer, the second he was just an engineer (probably on the railroad.) He was 63 years old and Martha was 47. Living with them in both were son George, 25, and 20 year old Anne Meyer, servant.