The Fairfax Villain has struck again, but for the last time. Follow his flight and demise, and seek out the booty he left behind.
Act I: The Chase
You arrive at the scene where the Villain was last seen (parking coordinates) and spy him dash into the woods at the far southwestern corner of the field. Hurry! A train is passing by and you see him hop aboard. Sprinting along the rail lines, you come to a sign (posted coordinates) and realize his next intended destination is discernible by investigating the sign.
AB.CDE FG.HIJ
AB = 3rd and 4th digit of $ amount
CD = $ amount / 50
E = last digit of date construction reached Mt. Jackson
FGH = first three digits of # of men Stonewall concealed in unfinished cuts
IJ = last two digits of date of map
sum of all digits (A...J) = 39
Act II: Dead Reckoning
You cross the railroad tracks and navigate into the forest. When you get to the right spot, you notice something so unusual it must be the waypoint. (How did that get there?) Taking a seat on the uphill side, you peer through the aperture. You align your sights with a large V further downslope, and there, some 25 strides away, across the creekbed, you find the Villain's remains perched high, holding secrets of his stash.
Act III: Villian's Cave
There is nothing left to do but press on and discover the final hidden treasure nearby. Go forth and conquer!