The Riddle of the Night ( a Cleek Mystery) by Thomas W.Hanshew

Hamilton Cleek, master of disguise, assists Superintendent Narkom of Scotland Yard in solving crimes while fending off dangers from his criminal past. The Cleek stories were written by Thomas W. Hanshew, until his death in 1914. His wife, Mary E. Hanshew, then took over this popular pulp mystery series.A man mysteriously murdered at night, the figures 2x4 x 1x2 scrawled on his shirt front, a broken shoe-polish label beside him. Cleek solved it. Can you?