Grimrock

I've completed the III, II, I, III sequence of teleporters in the Outer Sanctum (on the 9th Floor) and advanced to the next little area. This little area starts on a pressure plate with two dragon heads on the left and right (moving toward either of them releases a poison cloud). Straight ahead are two collapsing tiles. When I place an item on the pressure plate, I can advance to the first collapsing tile (which is no longer collapsing). To the left of the second collapsing tile is a grate that is closed, straight ahead (past the collapsing tile), is a tile I can advance to that has a slotted metal door, to the right (of the collapsing tile) is a teleporter.

I can time the collapsing tile and the teleporter to get past the teleporter to an alcove with a lever.

However, after I pull the lever down, I can't figure out what to do next. The lever doesn't open the grate or the slotted metal door (unless it is on a very short timer). I'm not sure what the lever is doing or where to go next.

Any help would be greatly appreciated.

Drax wrote:

SpoilerShow

Is that a pressure plate I spy on the other side of the metal grate?

Why, yes. Yes, it is.

Thank you Drax!