Most scholars dismiss the notion that Hitler seriously entertained the ideas of these cults, but the marginalia in several of his books confirm at least an intellectual engagement in the substance of Weimar-era occultism. The Brown collection contains books by such figures as Adamant Rohm, a "magnetopathic doctor" from Wiesbaden; Carl Ludwig Schleich, a Berlin physician who pioneered the use of local anesthesia; and Joseph Anton Schneiderfranken, who wrote numerous books on reincarnation and otherworldly phenomena under the pseudonym B Yin R.