Et toi mon coeur pourquoi bats-tu Comme un guetteur me¤  lancolique J'observe la nuit et la mort. And you my heart why do you pound Like some melancholy watchman I watch the night and death.

-Kostrowitzki
  Le Guetteur me¤ l ancolique, pre¤  face.

Except the L build the house, they labour in vain that build it: except the L keep the city, the watchman waketh but in vain. It is vain for you to rise up early, to sit up late, to eat the bread of sorrows: for so he giveth his beloved sleep.

-Bible (Old Testament)
ORDORDPsalms127:1^2.

Nisi Dominus aedificaverit domum, in vanum laboraverunt qui aedificant eam. Nisi Dominus custodierit civitatem, frustra vigilat qui custodit eam. Unless the Lord has built the house, its builders have laboured in vain.Unless the Lord guards the city, the watchman watches in vain.

-Bible (Vulgate)
Psalm126:1 (Psalm127:1  Authorized Version).

The duty of a journalist is the duty of a watchman.

-Stead,WilliamThomas
  'Government byJournalism', in the Contemporary Review, May. Collected in A Journalist onJournalism (1892).