It should not be that difficult to find out more about Jack Brown. I am sure long time residents of Krotona/Ojai would be able to throw some light on this guy. In addition, there is a distinct possibility he may been a member of TS and looking at the membership rolls at Wheaton might yield some results.
Anyone who is reading this has any contact at Ojai, it would be nice to check it out.
Are there any psychics around? May be they can also help not only to track Jack but also pin point the whereabouts of the SD copy and in a short order it can be scanned and uploaded to Internet so everyone can read all the margin notes of Einstein.