Dutch Treat (1885)

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   OED and M-W have 1885 for "Dutch Treat."  This is 1885, but indicates 1861.  From American Periodical Series online--also on Making of America?

August 1885, CENTURY ILLUSTRATED MAGAZINE, "A Virginia girl in the first year of the war," pg. 606:

   Already the pinch of war was felt in the commissariat; and we had recourse occassionally to a contribution supper, or "Dutch treat," when the guests brough branded peaches, boxes of sardines, French prunes, and bags of biscuit, while the hosts contributed only a roast turkey or a ham, with knives and forks.