Is there double jeopardy generated by a declaration of a mistrial after the jury has reported a deadlock?

We turn now to the problem of double jeopardy, generated by the declaration of a mistrial after the jury has reported a deadlock. Since it is impossible to define all the varying circumstances which would render appellate interference proper, it is essential, on review, to consider the pattern of events which preceded the discharge of the jury. See United States v. Perez, 22 U.S. (9 Wheat.) 579, 6 L.Ed. 165 (1824); United States v. Glover, 506 F.2d 291, 295 (2d Cir. 1974).