Holmes says I haven't finished exploring, but I can't find anything else to do.I've read all the documents and have picture. I think I need to get something else from the file, but I need some "name"?

I think you can enter that room even before you finished this room. Maybe you are not clicking the poker at the right place.

There are several things to get-read on the desk - key, Burgher's letter, bank letters, letter about the master and telegram.

In the file cabinet, check Woolf's file and see if you check ? mystery man.
Be sure that you checked the picture in Woolf's file.

If you need the name of Woolf - talk to Becker first.