Clark,
I don't recall seeing an illustration, picture, or any kind or a map of the fight at Blue Mills, MO (near Liberty, Clay County) on 17 September, 1861. Considering there were evidently hundreds of troops on each side of this fight, that seems strange, but there were other actions in Missouri at that time. I did a quick glance at the two national news week illustrated newspapers of that period ("Leslie's" and "Harper's"), but their reporters and illustrators were in other parts of Missouri in middle September 1861, and, apparently did not report of this action.

The Union government's "Official Military Atlas of the Civil War" on plate 161 on page 369 in general terms shows Liberty and the U.S. Arsenal in Clay County, but not much more, and doesn't not show Blue Mills Landing at all. I even checked a modern reproduction of the Clay County plat book of 1876, but despite the high detail of those maps, I don't see Blue Mills Landing at all in that work. I also have a modern reproduction of the 1861 map book of Missouri in high detail, but as a result of our recent moving to a new house, I cannot find it. Rats!!

Here are some sources I could find of the Blues Mills Landing fight for 17 September, if that will help you:
-- "Official Records" Series 1, volume 3, pp. 193-195 (which shows reports on the fight from both sides);
"Supplement to the 'Official Records of the War of the Rebellion'; Part 2, volume 19, pages 502 & 507 (from the 3rd Iowa Infantry);
-- Frederick Dyer's "Compendium of the War of the Rebellion," volume 2, page 798;
-- Carolyn Bartels' 1995 "The Forgotten Men" of the southern Missouri State Guard, page 127 showing one of the dead of Slack's 4th Division in the Company A 2nd Missouri Regiment;
-- Frank Moore, editor, "The Rebellion Record: A Diary of American Events, with Documents, Narratives, Illustrative Incidents, Poetry, etc" volume 3, pages 142-144 of 12
total volumes, originally published 1861-1868, reprinted in New York in 1977, by Arno Press;
-- "History of Clay and Platte Counties, Missouri," St. Louis, National Historical Company, 1885, pp. 209-211.

I hope that helps. Bruce Nichols