24 DECEMBER 1948, Page 17

A Police Biologist The old music - hall advice, " Ask a

Policeman," has been quaintly justified by a traveller who brought over some chameleons from Africa. He wanted, and sought in vain for, a male of the species, and finally in despair asked a policeman in the Strand I The sergeant instantly, and with no sign of surprise at the question, gave the desired information.