Give the central theme of the poem "Cock-Crow" by Edward Thomas.

The central theme of this poem is that the mundane things
in life are just as important, if not more so, than the more flashy things that
seem to be important.  This goes along with a major theme
in much of Thomas's work since he was a poet who was very concerned with describing the
humble details of country life.

For most of this poem, we
expect that the subject is something that is eye-catching and flashy.  We are told about
cocks crowing and how they cleave the darkness with their silver bows.  We are told
about "heralds of splendour" and coats of arms.  These are all things that seem
important and that draw attention to themselves.  Up until the last line, we think the
poem is about these things.

But then, in the last line, we
find that these are not really the focus of the poem.  Instead, it is farm workers who
are getting to go milk the cows -- a humble task if ever there was one.  The poem is
saying that these people who seem so unimportant are just as important as any strutting
roosters or splendid heralds.