1860 Census has Lyman as a 45 year old banker in Burlington, Iowa with $60,000 worth of real estate and $20,000 in personal property. No wife, but two children Henry, age 12, and Mary, age 9, who might be children from an earlier marriage.

1870 Census has his age as 49, living in Burlington with wife Lucia and daughter Louise A., age 8. His real estate holdings are now $80,000 and his personal property is at $75,000. Mary and Henry Cook live in the next household with a housekeeper who was also there in 1860. The next household is J.S. Schramm and family.

1880 Census:
  Household:
 Name  Relation Marital Status Gender Race Age Birthplace Occupation Father's Birthplace Mother's Birthplace
 Lyman COOK   Self   M   Male   W   59   OH   Banker   NY   NY 
 Lucia COOK   Wife   M   Female   W   49   NY   Keeping House   CT   CT 
 Louise COOK   Dau   S   Female   W   18   IA   At School   OH   NY 
 Christine ERICKSON   Other   S   Female   W   23   SWED   Servant   SWED   SWED 
 Anna GUSTAVSON   Other   S   Female   W   15   SWED   Servant   SWED   SWED 
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Source Information:
  Census Place 3rd Ward, Burlington, Des Moines, Iowa
  Family History Library Film   1254337
  NA Film Number   T9-0337
  Page Number   200B