In the Graveyard, how do you get into the Family Mausoleum? I've tried
everything, including the three keys I've found sofar, but the gate just
won't budge.

Using the Claymore just broke the sword. Fortunately the nearest Save
point is in the Chapel, so I didn't have to redo too much.

Can anyone help?

the Entity Formerly Known As Jazz

Use Linux. Educate yourself. Emancipate yourself.
(Paul Cooke on comp.os.linux.advocacy)