IT'S just a few short weeks since the people from the Ritz in London were in Hongkong to publicly request any past customers who may have inadvertently helped themselves to crockery, furniture, fittings etc from their hotel between the years of 1905 and 1945 to kindly turn them in. It is, of course, one of the worst kept secrets of this town that houses on The Peak are littered with ''souvenirs'' stripped from the Ritz. The items are to be put on exhibition in a special museum in London, with those returning the said items being rewarded with afternoon teas and champagne weekends. But the Ritz folk could hardly have been prepared for this one. One past guest has apparently written in to say that in the early 1920s he took off with a chambermaid at the hotel and had no intention of returning her. But would they have known how to exhibit her even if he did?