The scene I chose had several elements that I thought would work well in Black & White. Firstly, the sky was a good deep blue colour which could be darkened or lightened and the clouds burned in more for a more dramatic effect.
The gravel path and fence posts would look good with a high contrast applied and finally the trees already have a great level of shadow detail and highlights which could be brought out more in black and white.
Once open in photoshop, I used the burn tool at 3% exposure to burn in the shadows and mid-tones concentrating on the sky, trees and grass.
The bottom right hand corner needed a boost in contrast, so with a selective levels adjustment I boosted the contrast.
Finally I used the dodge tool, again at 3% exposure, to bring out the highlights in the trees, clouds and the sheep, also paying attention to the pathway.
I think that the resulting image is certainly aged and produces a pleasing version that is more interesting that the colour version.