and the difficulty of detecting the authors of such wrongs, which
are always done secretly, affords a ground for punishment, even
if revenge is thought insufficient.

How far the law will go in this direction it is hard to say. The
crime of arson is defined to be the malicious and wilful burning
of the house of another man, and is generally discussed in close
connection with malicious mischief. It has been thought that the
burning was not malicious where a prisoner set fire to his
prison, not from a desire to consume the building, but solely to
effect his escape. But it seems to be the better opinion that
this is arson, /1/ in which case an intentional burning is
malicious within the meaning of the rule. When we remember that
arson was the subject of one of the old appeals which take us far
back into the early law, /2/ we may readily understand that only
intentional burnings were redressed in that way. /3/ The appeal
of arson was brother to the appeal de pace et plagis. As the
latter was founded on a warlike assault, the former supposed a
house-firing for robbery or revenge, /4/ such as that by which
Njal perished in the Icelandic Saga. But this crime seems to have
had the same history as others. As soon as intent is admitted to
be sufficient, the law is on the high-road to an external
standard. A man who intentionally sets fire to his own house,
which is so near to other houses that the fire will manifestly
endanger them, is guilty of arson if one of the other houses is
burned in consequence. /5/ In this case, an act which would not
[65] have been arson, taking only its immediate consequences into
account, becomes arson by reason of more remote consequences
which were manifestly likely to follow, whether they were
actually intended or not. If that may be the effect of setting