yes,   busted!!!!
I take it, you've seen "that staircase"  in previous photos, lol.
  It's kinda like having 'central vac'  in the house. Actually, it takes a while to thoroughly vacuum those stairs and the upstairs hall. One time, during the major restoration part of the house,  I head a helper ask the carpenter, "What's with all the sweepers"? 
   But,  a Constellation OR a nice Celebrity with the upholstery brush  will really get all the creases in those steps.