We observe hadronic W decays in t anti-t --> W(-> 1 nu)
+ \geq 4 jet events using a 109 pb-1 data sample of p anti-p collisions
at s**(1/2) = 1.8 TeV collected with the Collider Detector at Fermilab
(CDF).  A peak in the dijet invariant mass distribution is obtained that
is consistent with W decay and inconsistent with the background prediction
by 3.3 sigma.  From this peak we measure the W mass to be 77.2 +/- 4.6
(stat+syst) GeV/c2.  This result demonstrates the presence of two W
bosons in t anti-t candidates in the W(-> 1 nu)+ \geq 4 jet channel.