| May 9th 1785 | | British inventor Joseph Bramah patents beer-pump handle
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| May 9th 1788 | | English parliament accepts abolishing of slave trade
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| May 9th 1836 | | HMS Beagle with Charles Darwin departs Port Louis, Mauritius
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| May 9th 1837 | | "Sherrod" burns in Mississippi River below Natchez Miss; 175 dies
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| May 9th 1846 | | Battle of Resaca de la Palma-US sends Mexico back to Rio Grande
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| May 9th 1862 | | US Naval Academy relocated from Annapolis MD to Newport, RI
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| May 9th 1862 | | Battle of Ft Pickens, FL (Pensacola), evacuated by CS
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| May 9th 1862 | | Battle of Farmington, MS
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| May 9th 1864 | | -20] Skirmish at Ware Bottom Church, Virginia
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| May 9th 1864 | | Battle of Cloyd's Mt, & Swift Creek, VA (Drewery's Bluff, Ft Darling)
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| May 9th 1864 | | Battle of Dalton, GA
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| May 9th 1864 | | Ship battle at Helgoland, Austria-Denmark
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| May 9th 1868 | | Anton Bruckner's 1st Symphony in C, premieres
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| May 9th 1874 | | Victoria Embankment, in London opens
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| May 9th 1882 | | Telegraph Hill RR Co organized
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