Life expectancy around the year 1800 was only about 36 years, so "middle age" (or median of lifespans) would be only about 17 or 18 years of age. By the time young people reached their late teens, they typically were expected to be working, married and carrying adult responsibilities.
Those life expectancy numbers can be a little misleading, though. A main reason that average life expectancy was only in the mid-30s is because infant mortality rates were very high. For persons who survived their childhood into adulthood, there was a good chance they lived to a much older age than 30-something.
The native population of the Spanish colonies (i.e., Native Americans in the area) died off due to wars between Spanish settlers and natives, poor working conditions in enslavement, and the tons of diseases brought over by the Spanish that Native Americans' bodies did not know how to fight all drastically wiped out native Spanish populations. They had to bring in a lot of slaves from Africa to make up for these losses.
Freemasons were the members of the secret fraternal order of Free and Accepted Masons that is a worldwide secret society.
Many of the founding fathers were freemasons, like George Washington, Benjamin Franklin, Paul Revere, John Hancock, John Marshall. So nine of the 56 men that signed the Declaration of Independence were Masons and 13 of the 39 that signed the US Constitution were also masons.
They find artifacts? There are no statements.