Content thyself to be obscurely good. When vice prevails, and impious men bear sway, The post of honour is a private station.

-Addison,Joseph
  Cato, act 4, sc.1, l.319^21.

Very sorry can't come. Lie follows by post.

-Beresford, Lord Charles
Telegraph to the Prince of  Wales, declining a dinner invitation. Quoted in Ralph Nevill The World of Fashion1837^1922 (1923), ch.5.

His blade struck the watera full second before any other†until, as the boats began to near the winning post his ownwas dipping inthe water twiceas fast as anyother.

-Coke, F T Desmond
  Sandford of Merton, ch.12. Often misquoted as'All rowed fast but none so fast as stroke'.

Nor at all can tell Whether I mean this day to end myself, Or lend an ear to Plato where he says, That men like soldiers may not quit the post Allotted by the Gods.

-Tennyson
  'Lucretius',1.145^9.

When Pearse summoned Cuchulain to his side, What stalked through the Post Office? What intellect, What calculation, number, measurement, replied? We Irish, born into that ancient sect But thrown upon this filthy modern tide And by its formless spawning fury wrecked, Climb to our proper dark, that we may trace The lineaments of a plummet-measured face.

-Yeats,W(illiam) B(utler)
  'The Statues', stanza 4. Collected in Last Poems (1939).