Very interesting. It appears that Wikicommons has implemented a more refined publicly accessible text proofing process, and at least one of PG's texts is part of their subject corpus. Take, for example, PG #32607; particularly the article about diazo compounds. http://www.gutenberg.org/files/32607/32607-h/32607-h.htm#ar23 Notice the embedded images; for example http://www.gutenberg.org/files/32607/32607-h/images/img174b.jpg Here are two versions of the same text on eb.tbicl.org. First, a clone of the PG ebook: http://eb.tbicl.org/vol08/4/#ar23 and then after processing it into an article: http://eb.tbicl.org/diazo-compounds As we have discussed previously, I have added to the page numbers by making them linkable to the page image on TIA. ------------------------------------------------------------- Here is the same article at Wikisource. http://en.wikisource.org/wiki/1911_Encyclop%C3%A6dia_Britannica/Diazo_Compou... You can see that the cropping in the embedded image is identical to PG's. Further, they have included a linkable page number (including an additional one at the heginning of the article.) But it doesn't link the same place. Instead it links to http://en.wikisource.org/wiki/Page%3AEB1911_-_Volume_08.djvu/191 which is their own editing interface for that page. So there it is. The public can proof a text derived almost directly from PG, using an interface that includes the page image and text text editor for matching. (Note to self: the image they use is from a source I wasn't aware of and the quality is pretty good - I need to check http://upload.wikimedia.org/wikipedia/commons/thumb/0/02/EB1911_-_Volume_08.... using a well-crafted page url template.) One might choose to repudiate the term "crowdsourcing", but it would be just semantics at that point.