Back to Mono

I was reading a black and white photo book and felt compelled to get out and shoot some monochrome images. I waited till to sun was low and went out on my quest for foreground interest. I didn't come away with a great deal, the sunset was great but I broke my own rules and came away about 10 minutes too early, I had to walk home backwards looking at the colours getting better and better! Anyway a polariser was used to really bring out the blue of the sky, I was at 90 degrees to the sun as this is where you get maximum effect of the polarising filter and I could get the light hitting the fence and grass. In photoshop used an unsharp mask to add a bit of contrast then some dodge and burning to selectively add contrast. Next I added a BW adjustment layer then flattened the image and converted to grey scale mode and then to duo tone mode, then I set to tri tone and used black and a 2 brown tones (can't remember the pantone codes). I converted back to RGB mode and saved. This split toning can be done in lightroom but I fancied doing it in CS3.