Big Thanks to Raze for that insightful answer (saves me a lot of work...)!
Unfortunately, the problem with reputation is that it has to be >19 to get the key to the garden from Blake (see
this thread, last post)
Edit: Raze was right (see below). You don't need a rep. of 19. The invitation to the castle is obviously sufficient, because I got the key from Blake yesterday night and my rep. was only 10. Actually, I think I got two invitations: one by poisoning the orc well and the other by solving the Dr. Elrath quest(... deleted the rest of the original post...)
