BUCK DANCERS IN LONDON SALONHow American Woman Intro-bsducsd “Cake Walk.Ia •Mr a. Avrery Had Negro Uoncers “fn Dahomey” Come to Her Homo * and Show London What the Cakewalk Is X4Jke-^Prin.-comes present*Special Cable.London, May ft.—Mr*- Frank Avery willlecelve many congraitiilatlona from fcreon her engagement to Mr* Howard Willetts, of New York* We all have the pleasantest memories of her and her at-solutely unique parties- There have been many daring and original American hostesses from time to time.In London, hutnever any one who could approach Mrs. Frank Avery for what many people call-,ed sheer outlandish ness.For weeks all London talked about a party she gave at her house In Grosvenor square during the season of 1003- It was the first time X*onlt;aon society was Introduced to the cake wack, and London, society, which knows how to appreciate orlginaltty, though it , possesses little of the character la tic itself, clapped its hands and promptly learned the new dance, 5?hlsis how Mrs. Avery arranged the matter.She had been cudgelling her brains for weeks for a new notion for a party. One night when she was at the Shaftesburytheater seeing In Dahomey'* It suddenlyflashed in upon her that It -would be real fun to .have the whole troupe ■. of colored dancers invade her ball room at I a* m- and dance the cake-walk. No sooner thought of than done. She arranged It that very nightj Mrs. Avery tried to keep her surprise a iseeret, yet It leaked oat here and mere, finally reach-