  We have studied the transport properties of transmission electron microscope
(TEM) lamellae obtained from a pyrolytic graphite sample of grade B (SPI-II)
with electrical contacts at the edges of the graphene layers. The temperature,
magnetic field, input current dependence of the resistance as well as the
current-voltage characteristic curves are compatible with the existence of
granular superconductivity below 5~K. TEM pictures of the studied lamellae
reveal clear differences of the embedded interfaces to those existing in more
ordered pyrolytic samples, which appear to be the origin for the relatively
lower temperatures at which the granular superconductivity is observed.
