I recently went through the 20th ward looking for my relatives.
I have attached details for each enumerator. There are 227 IMAGES. Each image ususally has 2 pages - a right and a left.
There were 9 enumerators which corresponds with a list I found from the Brooklyn Daily Eagle.
There are a few that did not list the boundaries of their assignments. However, there are Places of Worship listed which might help to determine where they were working.
I've also noted pages where marriages and deaths are listed as I found them.