You have 5 natural inventory spaces, with a bow, torch, an empty bottle (that Tenebrae may or may not know you have; depends on if you put it away before or after giving him the blue potion) and a red potion (that nobody knows you have), you do have one more inventory space supergleeok/locke. But isn't it also your rope that is tied to the banisters on the stairway? You may want to save that space to carry that rope again, unless you intend to let someone else have it. Also, don't forget, there are still two more (unbroken) empty bottles that only
you know about at the chest.
But also, Shadow (i-am-link) doesn't know what was in the chest, but he was the only one in the room at the time, so he may have seen you snooping around where you found the chest. Really depends on if you intend to keep the rewards of the chest a secret from the other characters or not.