Pt Barnum Blue Oval Envelope

Anyone ever see one like this? Saw a couple posted but not with this advertising.

What does the other side look like? Thanks.

Guess I should have said it was an envelope. 3 X 5 1/2"

Great item! Per Wiki:

William Street Hutchings, (January 7, 1832 - August 25, 1911)[1] also known as Professor Hutchings and the Lightning Calculator, was a 19th-century math prodigy and mental calculator who P. T. Barnum first billed as the "Boy Lightning Calculator". He later worked as a sideshow barker and wrote a book called The Lightning Calculator.

By 1860, Hutchings was working at Barnum's American Museum. He worked there until it burned down the second time in 1868. In 1872, he performed at the White House for President Ulysses S. Grant. In 1883, he began performing at Austin and Stone's Dime Museum. He continued to perform there until the time of his death. He claimed to have given 30,000 lectures to 80,000,000 people during the course of his career.[7] He was buried in Mount Hope Cemetery in Boston, Massachusetts.



Given that, your item dates to 1860 to 1868.

Thanks centerstage but that information was easily found. I know about PT Barnum & Hutchings.
I'm asking about the cover the way you see it. It has a 1860 copyright date.

This is what I found out..
https://collections.ctdigitalarchiv.../110002:2655

Is there a philatelic connection and if so, what is it?


Peter

Not sure Peter that's why I'm asking..