Agnes Grey

Confirmed: there is no separate first edition of Agnes Grey. The true first is physically the third volume of Newby's 1847 Wuthering Heights three-decker, so it is almost never found alone, and a stray volume III on the market is a broken set rather than a self-contained first. Circulating libraries lent the volumes singly and later sold them off singly, which is why complete three-volume sets — not the individual books — are the rarity. No earlier or competing printing of the text exists.