It has now been digitized and can be found at archive.org/stream/newschaffherzog01jackgoog/newschaffherzog01jackgoog_djvu.txt for anyone interested. Most browsers have the capability to do a word search within that online document for anyone who doubts the existence of the text in question. (I did)
Of course at this point portions of it can be found on many different sites quoting from that original. I simply gave the original lest anyone questions the authenticity of any site portions may be found on.
How about using the Encyclopedia Britannica, an unbiased secular source, and not in the pocket of the Vatican as some have claimed.