The Last Leaf
In a little district west of Washington Square the streets have run crazy and broken themselves into small strips called "places." These "places" make strange angles and curves. One Street crosses itself a time or two. An artist once discovered a valuable possibility in this street. (suppose a collector with a bill for paints, paper and canvas should, in traversing this route, suddenly meet himself coming back, without a cent having been paid on account!)
I don't get its meaning clearly and also about the term "should" at the end of the sentence!
Is collector someone who collect money for somethings done that people should pay for them?
Could you write it in the other words to make it clearer?
Sorry my english is not so good. If I made some mistakes please correct me. Thanks in advance.