Well, considering the Battle at Niagara Falls is also called "The Battle of Lundy's Lane," I would say that Catherine Lundy was a special woman indeed in regards to the War of 1812!
In short, one of the bloodiest battles in Canada was fought near her property and on the road named after her (hence the name of the battle)! Lundy is known as kind of a saint. She gave water to British troops and nursed the wounded. As is indicated above, one British officer was so thankful that he visited Lundy and gave her his sword.
In regards to exact birth and death, there isn't any definitive information on Catherine Lundy; however, it can be assumed that she was born in the very late 1700s and died sometime near the middle of the 19th century. (This is based on the fact that she was still in her "teens" at the break of the battle and the fact that she had eight children with Thomas Lundy.)