Peering in, we (could) [?] see that the only light in the room (came) [?] from a dull blue flame which (flickered) [?] from a small brass tripod in the centre. It (threw) [?] a livid, unnatural circle upon the floor, while in the shadows beyond we (saw) [?] the vague loom of two figures which (crouched) [?] against the wall. From the open door there (reeked) [?] a horrible poisonous exhalation which (set) [?] us gasping and coughing. Holmes (rushed) [?] to the top of the stairs to draw in the fresh air, and then, dashing into the room, he (threw) [?] up the window and (hurled) [?] the brazen tripod out into the garden.