Zra, I have no idea what you mean.

Dave, although perhaps no one can say what happened on those specific dates, I can offer some historical context. 

1851 is two years after Minnesota Territory was signed into existence by President James K. Polk. The territory had a population of about 10,000 American Indians and 5,000 white settlers at the time, and included the portions of North and South Dakota east of the Missouri River.

1851 is three years before the LaPointe Treaty was signed, making white settlement in Minnesota possible. 

1874 is one year after Jay Cooke's bank failed, precipitating a financial panic.

1874 is three years before Duluth lost its city charter and reverted back to village status. (City status was regained in 1887.)

Tamara is incorrect.

Tony Rubin is correct! And since he's not in a band playing Homegrown this year, he can probably use the free ticket.

I guess I screwed up worse. I was less than a month from being 160 years to the day since absolutely nothing happened.