Footstool
FIG. 1 is a perspective view of a footstool embodying our ornamental design; 
     FIG. 2 is a top plan view thereof; 
     FIG. 3 is a front elevation view thereof with it being understood that the rear elevation view is identical thereto; 
     FIG. 4 is an side elevation view thereof as viewed from either side; and 
     FIG. 5 is a bottom plan view thereof.