"London" by William Blake

"In every cry of every man
in every Infant's cry of fear,
in every voice, in every ban,
the mind-forged manacles I hear" ("London," Blake).

This quatrain in "London" by William Blake seemed to portray an image of London when France attacked them in 1794 through imagery.  Blake repeated the word "every" as a way of really showing how huge of an effect the invasion had throughout London in every aspect of human life.  "Mind-forged manacles" seems like a very strong way of Blake depicting the feelings of entrapment within the citizens of London.  France did not shackle the citizens, but every citizen was scared to the point that they would not actually do anything.  The feelings of imprisonment were so strong in the mind's of all the people that it was even noticeable in their voices it would feel.

I am very confused by two things throughout this entire poem, each deriving in the context of words that I do not think kept the same meanings throughout history.  When Blake said, "And mark in every face I meet," I am very confused by what he means by "mark."  I suppose he may mean that every face appears as though someone had branded it with fear or woe since it was blatantly expressed on their faces.  The other phrase which is alluding me is, "in every ban," which is used in the above quote.  I suppose dictionary.com's definition of...

a malediction; curse.

is closes to the use in "London," but I really have no clue at all.

Lastly, the handout says that lines 11 and 12 cannot be read literally.

"And the hapless Soldier's sigh
Runs in blood down Palace walls."

I absolutely cannot figure out any symbolism that this could mean.  Is it maybe still further portraying the helplessness in the citizens, but maybe transferring this hopelessness to the monarchy as well?

P.S.  I love Firefox's auto-save.  Firefox randomly crashed twice as I typed this.