Calvin Wilson Mateer
Calvin Wilson Mateer was a missionary to China with the American Presbyterian Mission. Calvin Mateer was of ScottishIrish descent and a native of Cumberland County, Pennsylvania. He graduated from Western Theological Seminary, Pittsburgh. After serving with the Presbyterian church of Delaware, Ohio for two years, he arrived in Dengzhou with his wife Julia Brown Mateer in early January 1864 and continued to work as a missionary in China for 45 years.
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Source: Wikipedia