  We try to separate the perturbative and non-perturbative contributions to the
plaquette of pure SU(3) gauge theory. To do this we look at the large-n
asymptotic behaviour of the perturbation series in order to estimate the
contribution of the as-yet uncalculated terms in the series. We find no
evidence for the previously reported Lambda^2 contribution to the gluon
condensate. Attempting to determine the conventional Lambda^4 condensate gives
a value of approximately 0.03(2) GeV^4, in reasonable agreement with sum rule
estimates, though with very large uncertainties.
