Thomas G. Copp (1819-1886) was born in Castine, Maine, and died in Somerville, Massachusetts. He married Harriet L. B. Wass in 1841. They moved west and settled in Iowa in 1855, platting the town of Grundy Center and constructing its first building. They moved to Eldora, Iowa, in 1875, where Copp purchased the local flouring mill. In early 1886, Harriet Copp wrote to Mary Baker Eddy, asking for information about Christian Science treatment through prayer for her husband.

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