This is great. Would love them in a more accessible format. 10 mins in and I still haven't been able to find anything actually written by him… :-)
All 80,000+ documents from the archives:
http://alberteinstein.info/vufind1/Search/Results?lookfor=*&...
I know, intuitive, right? You know it's a "a user-friendly interface" because they say so [1].
"Notes on field theory and general relativity", by using the query "General relativity". I hope there'll be more like this, it's quite interesting to see.