A study on Five Period Embroidery stitches by Jane Stockton.Those interested in learning how basic stitches were used in olden times would find enjoy this document . Has good number of images of centuries old embroidery.
If you are an absolute beginner or someone who wants to refresh their embroidery skills or if you want to improve your bullions or french knots this document at magicembroidery would be perfect. It has very good pictorial explanations of some basic stitches including the Bullion .I found the bullion explanation absolutely superb.
I found another link which seemed to be a reproduction of material from books like Beetons book of needlework.Here it is http://www.knitheaven.com/vintagepatterns/embroideryindex.htm
What do you think ? Aren't these good discoveries?