Purse returned in rush hour underground

In the school summer holidays (late July /August) 1962 I was asked one moring to meet a french speaking creole ( that was how she was described to me) off the boat train at Victoria Station, show the woman London and take her to the Convent in Slough that evening. I met the woman easily but as he she had two enormous suitcases we went by tube to Waterloo station to put them in left luggage before site-seeing. At The Left Luggage department I realised that I had lost my purse with return ticket and money. The woman had some money so we set off to "do " London. After St Pauls, the Monument and The Tower of London we set tout to retun to Waterloo in the rush hour via Tower undergroud station. As we went towards the entrance there was a surge of people coming out. A man came forward from the crowd and said to me " Here is your purse" and handed it to me. He expained that I had dropped it whilst getting out of the tube at Waterloo some 3 hours earlier but the doors had closed before he could tell me. As it was 1962 there were few afro-caibbean people in London and as we spoke only French, we must have been noticeable, but it was a completly different part of London and some three hours later that he recognised me..