I found: first, a fragment of green material; second, a stain on the carpet near the window, still damp; thirdly, an empty box of bromide powders. 
I found a piece of green cloth, a bloodstain on the carpet, and an empty box of poison. 
mnli hypothesis: I found a piece of green cloth, a bloodstain on the carpet, and an empty box of poison.  premise: I found: first, a fragment of green material; second, a stain on the carpet near the window, still damp; thirdly, an empty box of bromide powders. 