Gratitude is not the mention — Publishing

Gratitude-is not the mention 1
Of a Tenderness,
But its still appreciation
Out of Plumb of Speech.

When the Sea return no Answer 5
By the Line and Lead
Proves it there's no Sea, or rather
A remoter Bed?
(F.1120/J.989)
[3] still:: calm, placid.
[4] Plumb of Speech:: frank,downright words.
[5] the Sea:: the vast world of publication.
[6] Line and Lead:: line of words and guidance.
[7] no Sea:: no profoundness.
[8] remoter Bed:: more distant, alien foundation; alluding the flat part of a printing machine.