changeling

[S]he, as her attendant, hath / A louely boy ſtollen, from an Indian king: / She neuer had ſo ſweete a changeling.

Used here to refer to the human infant taken by the magical creature, rather than the infant left behind.]

When I firſt read Mr. Walker’s Circular Letter to the Arch-deacons, I fancied he intended to give us an Account of thoſe worthy Men, … But after about ten Years going with this Work, and that the Time of its Birth was come, I ſoon found it to be a perfect Changeling. Inſtead of what I expected it to be, I ſaw a huge Heap of the moſt Heterogeneous Characters, … a great many of them much more deſerving to have their Names blotted out, than their Memory to be preſerved.

To face the garment of rebellion / With ſome fine colour that may pleaſe the eye / Of fickle changlings and poore diſcontents, / Which gape and rub the elbow at the newes / Of hurly-burly innouation, …

They alſo obſerue Lunaticks and changelings, and the Coniurer writeth downe their ſayings in a booke, groueling on the ground, as if he whiſperd to the Deuill to tell him the truth, and ſo expoundeth the letter, as it were by inſpiration.