Answer: "The (1846) crack" is what both sentences have in common, therefore we can combine them like this:
Since it could not be fixed, the Liberty Bell has had that crack in it ever since.
Soooo what do you have in mind?
Maybe because the word doesn't really look like our language now.
There is no rule.
In Thoreau brothers' class, there was only one rule--that there were no rules. Thoreau encouraged the students to think for themselves and pursue knowledge without boundaries. It was encouraged to question authority. Although humility was also encouraged--to recognize knowledge that is known and unknown.