  We demonstrate a new likelihood method for extracting the top quark mass from
events of the type ttbar-->bW(l+nu)bW(l+nu) This method estimates the top quark
mass correctly from an ensemble of dilepton events. The method proposed by
Dalitz and Goldstein [1] is shown to result in a systematic underestimation of
the top quark mass. Effects due to the spin correlations between the top and
anti-top quarks are shown to be unimportant in estimating the mass of the top
quark.
