Addressing the nobleman (him), but having in mind the Galilean population which he represents (ye).
Signs and wonders (σημεῖα καὶ τέρατα)
See on Mat 24:24. Σημεῖα, signs, and ἔργα, works, are John's characteristic words for miracles. See Joh 5:20; Joh 7:21; Joh 14:10; Joh 2:23; Joh 6:2, etc.
Ye will not (οὐ μὴ)
The double negative is correctly given by Rev., “ye will in nowise.”