On Guggenheim see here and here
and Oma's Story (Lucie Prenzlau pg. 8 et passim)
Much can be learned about a man and his beliefs or lack of beliefs from such a catalog, below see a few scans of the catalog for such examples.
|In section above, Guggenheim goes an aside discussing the forged Yerushalmi on Kodshim of Friedlander|
|See under Besamim Rosh where he discusses the status of the author|