Edited 12-14: It appears that computers outside the USA have trouble downloading this booklet. This booklet is in the public domain in the US, but perhaps not in other countries.
Edited 12/13 to Add: some people are having some trouble downloading this booklet, and one poster said it had been removed from the Google Books site. But I just went and downloaded it again, so it's still there (or it has been put back, which is more likely). If it's still available when you try again, click on the PDF download link below, then on the upper right portion of the page that opens is another PDF link. Click that and it should open in your Adobe reader. Save it from there.
The Socknitters Yahoogroup put me on to this amazing 1915 downloadable sock knitting book, written by Maud Churchill Nicoll. It's available through Google Books as a PDF download. I haven't had a chance to read it all, but the booklet is 101 pages, and it features many toe and heel treatments.
p.s. click on the link, click on PDF, and then save