Authors' response: What we called magneto-thermogalvanic voltage (see, for example, ref.
1) is, in the case of granular systems, the experimental determination of the derivative of the
resistivity with respect to temperature. It suppresses the large fieldand temperature-
independent scattering processes. Its advantage is comparable to that of, for example, dI/dV
experiments that reveal conductivity features otherwise undetectable by direct
measurements of current versus voltage. We wish to clarify a few points about our samples …

Authors' response: What we called magneto-thermogalvanic voltage (see, for example, ref.
1) is, in the case of granular systems, the experimental determination of the derivative of the
resistivity with respect to temperature. It suppresses the large fieldand temperature-
independent scattering processes. Its advantage is comparable to that of, for example, dI/dV
experiments that reveal conductivity features otherwise undetectable by direct
measurements of current versus voltage. We wish to clarify a few points about our samples …