Welcome to the Forum.
You should have a look at Stampsmarter. In particular the US Identfier.https://stampsmarter.org/1847usa/AL...ntifier.html
In this instance,you might try searching by keyword on Monroe. You'll get a few candidates for identification, depending on the perforation, which you will want to gauge.
If you do not yet have a gauge, it is essential equipment for the US coollector. There is a printable one elsewhere on the Stampsmarter site, which you should explore often. Lots of great information.