Christopher Jon Bjerknes
I discovered an online version of an important book by John Allen, Modern Judaism: or, A Brief Account of the Opinions, Traditions, Rites, and Ceremonies of the Jews in Modern Times, Second Revised and Corrected Edition, R. B. Seeley and Sons, London, (1830). Note that Google offers a downloadable pdf of the book file in the upper right part of the webpage. See pages 195, and 242 and forward. The book is sort of a mild version of the works of Buxtorf and Eisenmenger, whose works, though rare, are to be preferred. I will be adding a link to my books page.