Here you go Damon ~

'The Steamboat Affair at Pine Bluff'
http://online.flipbuilder.com/digitalpbjc/uumk/index.html#p=4

Again, Bocage is the main source for this. The telegram from Hindman is mentioned. This event seems to have occurred in April 1861, prior to Arkansas leaving the union.
Bocage references himself as 'Capt' and Hindman as 'Colonel'. Both the Southern and Jefferson guards (with Capt. Carlton) are mentioned and actively part of the affair. Shots WERE fired.

Hope this helps!

Scott