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1
Isaac Downs. (To accompany Bill H.R. No. 270.) May 9, 1850
United States congressional serial set ; serial set no. 584;House report / 31st Congress, 1st session. House ; no. 301
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2
Isaac Downs. June 20, 1848
United States congressional serial set ; serial set no. 526;House report / 30th Congress, 1st session. House ; no. 712