The two boys started in suprise at the fresh muddy imprints of a pair of bare feet . What was a barefooted man doing on the steps of a house , in the middle of London? And where was the man?
As they gazed, a remarkable sight met their syes . A fresh footmark appeared from nowhere!
Further footprints followed , one after another, descending the steps and progressing donwn the street . The boys got fascinated and followed,and the muddy impressions became fainter and fainter and at last disappeared altogether.
The explaination of the mystery was really simple enough. The bewildered boys had been following a scientist who had just discovered how to make the human body transparent.
Griffin , the scientist, had carried out experience after experiment to prove that the human body could become invisible . Finally , be swallowed certain rare drugs and his body became as transparent as a sheet of glass though it also remained as solid as glass.
Brilliant scientist though be was, Griffin was rather a lawless person .His landlord disliked him and tried to eject him . In revenge , Griffin set fire to the house . To get away without being seen be had to remove his clothes. This it was that he became a homeless wanderer, without clothes, without money, and quite invisible untile he happened to step in somemud and left footprints as he walked.