Rockefeller and Maurice Clark pledged $4,000 for half the working capital of the new refining venture, Andrews, Clark and Co., placing the twenty-four-year-old Rockefeller squarely in the oil business in 1863, the year of the Emancipation Proclamation and the stunning Union victories at Gettysburg and Vicksburg. Of the initial $4,000 investment, he said dryly, “It seemed very large to us, very large.”4 Scarcely dreaming that oil would ever supersede their main commodity business, they considered it “a little side issue, we retaining our interest in our business as produce commission
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