Have you tried picking the lock on the Garden gate?
I have no idea if this wors or not, I have to admit, but it seems worth a try...
I tried up to level 4 (the best I can do at the moment) but as the poster below points out, even level 5 doesn't work. In the end I did the save-fudge thing and fixed my game that way. It seems a bit like the cemetary was put togther in a hurry as not only do the gates use the nericon garden key, but three of the trunks in the crypt are in fact the very same trunk (ie, stick summat in one trunk and it appears in all three, take it out of one trunk and it's taken out of all three).
