There's one more finishing touch I'd like to do with this image. Traditional black and white photography would ordinarily have some film grain. Since this was a digital photo, you don't get that grainy quality, but we can add it with the noise filter.
Make a duplicate of the background layer by dragging it to the new layer icon on the layers palette. This way we leave the original untouched and can remove the effect simply by deleting the layer.
With the background copy selected, go to Filter > Noise > Add Noise. Set the amount between 3-5%, Distribution Gaussian, and Monochromatic checked. You can compare the difference with and without the noise effect by checking or unchecking the preview box in the Add Noise dialog. If you like it click OK... if not, adjust the noise amount more to your liking, or cancel out of it.
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