What type of mood does "the moon was a ghostly galleon tossed upon cloudy seas" set up in the poem "The Highwayman" by Alfred Noyes?

Keep in mind
that the literary term mood, is very similar to the term
emotion.  As it is by
definition combined with setting, the mood can also be analyzed as
.

"The Highwayman" establishes within the very
first stanza a distinct, ghost-story-like quality to the atmosphere.  First, it is night time
and we know that it is not only windy, but dark and cloudy.  The moon as a "ghostly
galleon" is acomparing the moon to one of those old large sailing ships from the 16th
century we now see most often represented in paintings.  Such ships were very large, and knowing
that the moon itself does not move, you can imagine the way the wind is blowing the clouds that
the illusion of a sea is created.  I also get the distinct impression that this moon is
full.

All of this intentionally sets up a somber and somewhat eerie mood. 
Keep in mind, however, that as the opening stanza of what is ultimately a poem about love, in
addition to death and revenge, there is also an element of mystery established in these lines. 
The use of the word "ghostly" certainly suggests ghost story, but
a full moon (or at the very least, the bright moonlight on an otherwise ominous night) is also
suggestive of romance.

As the action in poem picks up in future stanzas, you
will notice that this original eerie, romantic, but mysterious mood, created in the very first
stanza, seems to remain mostly constant.