Cóng tā de shénqíng zhōng, wǒ yǐjīng kànchū le yīxiē duānní.
From his expression, I could already make out some clues.
Tips
usage
端倪 often appears in the phrase 看出端倪 (to detect a clue / to see through something). It refers to the subtle signs or traces that hint at something larger.