Signed, in plate, upper right, with Whistler's butterfly monogram; Signed, in graphite, below the plate line, lower left, with Whistler's butterfly monogram, followed by the abbreviation "imp."
Stamp, in blue, verso, HM in circle [Howard Mansfield. Lugt 1342] Stamp, in black, verso, HW [Harris Whittemore. Lugt 1384a. See also Lugt 1342]
Inscribed, in graphite, verso, Wb (underlined, possibly WL), Glasgow suggests this might be an unidentified collector’s mark) Inscribed, in graphite, verso, center of sheet, Regent’s Quadrant; lower center, WW