I adapted a methos detailed at
http://forums.dpreview.com/forums/re...ssage=10263013 tro get a pen and ink sketch.
Copy background layer and desaturate it
Copy desaturated layer, invert it and change Blend Mode to Color Dodge.
Filter >> Blur >> Gaussian Blur with moderate blur to draw the sketch lines (try 7-12 pix)
Add curves layer and pull the curve downward from the middle (half way down) to increase lines contrast.
Copy background a third time and move it to the top of the stack. Apply Filter >> Artistic >>Dry brush (size=5, brush detail=2, texture=1) and set Blend Mode to Multiply.
Add Hue&Sat layer and check Colorize. Other settings: Hue 45, Sat 32
New layer the ALT Merge Visible
Adjustments > Shadow/Hightlight (Shadow 50% Highlight 25%)
Levels layer (Input Levels 9, 1.16, 232)