The secret'st man of blood.--

In this passage the first line loses much of its force by the present
punctuation. Macbeth having considered the prodigy which has just
appeared, infers justly from it, that the death of Duncan cannot pass
unpunished;

It will have blood:--

then, after a short pause, declares it as the general observation of
mankind, that murderers cannot escape:

--they say, blood will have blood.

Murderers, when they have practised all human means of security, are
detected by supernatural directions:

Augurs, that understand relations, &c.

By the word _relation_ is understood the _connexion_ of effects with
causes; to _understand relations_ as _an augur_, is to know how those
things _relate_ to each other, which have no visible combination or
dependence.


NOTE XXXIV.

SCENE VII.

_Enter Lenox and another Lord_.