Usher and Thrall bank

George Evans Thrall who was born on 4 February 1821 and died on 29 April 1905, is known to have moved to Monroe, Wisconsin, USA with his family and he went into the banking firm of Usher and Thrall. The Civil war stopped all private banking.

That is all the information that I know about Usher and Thrall. Of course we want to find out more about a bank called Thrall! Do you know anything? Do you live near Wisconsin, and have a little time to search in the archives?