What is associated with: 1843 1901?

What is associated with: 1841 coopers last of the leatherstocking tales in which natty bumppo goes stag? What is associated with: 1841 pair whose nicknames included tippecanoe his accidency? What is associated with: 1842 robert browning my last? Who performed with '1843 and the pendulum'? What is associated with: 1843 marley was dead to begin with? What is associated with: 1843s incidents of travel in yucatan was devoted to telling of this civilizations ruins? What is associated with: 1844 during a tooth extraction dr horace wells makes the first use of this gas as an anestheti… What is associated with: 1844 henry clay?