  This is a continuation of the series of notes on the dynamics of quadratic
polynomials. We show the following
  Rigidity Theorem: Any combinatorial class contains at most one quadratic
polynomial satisfying the secondary limbs condition with a-priori bounds.
  As a corollary, such maps are combinatorially and topologically rigid, and as
a consequence, the Mandelbrot set is locally connected at the correspoinding
parameter values.
