Stanza 1 of "London" by William Blake is as follows:
I wander thro' each charter'd street,
Near where the charter'd Thames does flow.
And mark in every face I meet
Marks of weakness, marks of woe.
I am curious about the usage of the word "mark" in this context. The word clearly has a double meaning, as it is used by Blake as both a verb and a noun. While I acknowledge that in line 4, "mark" most likely means "stain", I had a different interpretation. Could "mark" be used as a name, so that Blake would be referring to Marks with weakness and woe? As a common name, it could help reinforce the widespread suffering the poem is about.