Among other rare engravings by Elstracke were similar portraits of Frederick V, Elector Palatine, and Princess Elizabeth (Dent sale, £23.), and James I of England and Anne of Denmark (Dent sale, £65) A portrait of Sir Richard Whittington was first engraved by Elstracke with the hand resting on a skull, which was subsequently altered to a cat; in its original state it is extremely rare. Among other notabilities whose portraits were engraved by Elstracke were:  Elstracke also engraved numerous frontispieces. A print of James I sitting in parliament is dated 1624, and there is a similar print of Charles I ascribed to Elstracke.