Here’s an unpublished map of the First Bull Run battlefield, by Confederate engineer D. B. Harris. According to the notation, this sketch was used by Beauregard to prepare his map of the battlefield. It’s a recent acquisition of the Manassas National Battlefield Park and has been provided by Ranger Jim Burgess. You’ll need to use your photo viewer’s zoom to see the detail. I’ve viewed the original and it’s quite faded. It’s difficult to tell exactly what is being depicted here – for instance, is this as of a point in time or does it show movement? Look at all the guns shown north of the Warrenton Pike, for instance. Click once for a larger image. Click that image for a really large image.
By sketch I mean this was made on the field and was not a final product. As noted on the map, it was surveyed, so it is more than a free-hand sketch. FYI, Confederate items are in blue.