six to
eight p.m.
------------------------------------------------------------------------ Note 1 . This ordinary watch consists of four hours , and the bell is struck every half-hour . As the first watch commences at eight , it was then eleven . There are two dog-watches from four to six and from six to eight p.m. , in order that the same men may not be on duty at the same hours each day . `` Hillo ! who have we here ? '' I heard one of the mates exclaim , as I was taking a last look of our receding antagonist .