I can'tell believe I found it. Daily True Delta, New Orleans, LA August 9, 1860.
This was part of the story...I last I saw this was 2010.
Wells Fargo and Co.'s express was lately robbed in the most polite way of $15,000 near Chico, Butte County, California. ...by way of mollifying Charley's (the stage driver) feelings the highwayman politely assured him, upon his honor as a gentleman, that he was not a murderer, and did not desire to take a dollar from any person then present...."but your company advertise that they have a capital stock of $500,000, and $15,000 to divide among the boys would not be missed, Charley, you know."
I have family in Chico and I am familiar with Black Bart in that area. Classic BB robbery.