CENTRAL AFRICA THE CRUMBLING FEDERATION AS LONG AGO AS LAST DECEMBER, IT WAS OBVIOUS THAT THE SHAKY CENTRAL AFRICAN FEDERATION WAS NOT LONG FOR THIS WORLD . OBVIOUS, THAT IS, TO EVERYONE BUT THE FEDERATION'S PRIME MINISTER, BIG- BEEFY SIR ROY WELENSKY, WHO STOUTLY INSISTED THAT CONTINUED PRESENCE OF THE WHITE MAN IN AFRICA " DEPENDED ON THE MAINTENANCE OF THE UNION OF NORTHERN AND SOUTHERN RHODESIA . ROOM SULKERS . LOOKING HIS MOST BULLDOGGISH, AND GIVING A JAUNTY THUMBS-UP SALUTE, WELENSKY STORMED INTO LONDON LAST WEEK, PROPHESYING RUIN AND ANARCHY IF HIS WARNINGS WERE IGNORED . ASKED IF HE WOULD USE FEDERAL TROOPS TO PREVENT THE SECESSION OF BLACK-DOMINATED NORTHERN RHODESIA, SIR ROY REPLIED, " THE ONLY TIME ONE WOULD USE FORCE WOULD BE TO MAINTAIN LAW AND ORDER . ONE WOULD NOT STAND BY AND SEE THINGS SMASH . BUT IF YOU ARE ASKING ME WHETHER I WOULD USE FORCE TO KEEP THE TWO RHODESIAS TOGETHER, THE ANSWER IS NO, BECAUSE IT WOULD NOT WORK . " BY THE TIME WELENSKY CHECKED INTO THE HYDE PARK HOTEL, NATIONALIST KENNETH KAUNDA, TOP AFRICAN LEADER IN NORTHERN RHODESIA, HAD ALREADY ATTENDED HIS FIRST MEETING WITH BRITAIN'S DEPUTY PRIME MINISTER R . A . BUTLER TO DECIDE THE FUTURE COURSE OF CENTRAL AFRICA . OF RAMBUNCTIOUS SIR ROY, KAUNDA SNEERED, " WE ARE HERE TO ROB HIM OF HIS JOB . YOU MIGHT MAKE HIM LORD BROKEN REED . " WITH RAB BUTLER, KAUNDA AND HIS FELLOW NATIONALIST, HARRY NKUMBULA, ARGUED FOR TWO HOURS NORTHERN RHODESIA'S RIGHT TO SECEDE, AND ASKED WHY THEIR COUNTRY SHOULD BE CONSIDERED " THE CINDERELLA OF CENTRAL AFRICA . " WHEN BUTLER REFUSED TO MAKE ANY PROMISES, THE TWO AFRICAN LEADERS WALKED OUT AND SULKED FOR TWO DAYS IN THEIR HOTEL ROOMS . POWER SEEKERS . THIS APPARENTLY WAS ENOUGH FOR RAB BUTLER . HE CALLED IN WELENSKY AND SOUTHERN RHODESIA'S PRIME MINISTER WINSTON FIELD, A LEAN, ENIGMATIC FARMER WHO IS LESS INTERESTED IN THE FATE OF THE FEDERATION THAN IN SEEING TO IT THAT SOUTHERN RHODESIA'S 221,000 WHITES RETAIN POLITICAL CONTROL OF THE STATE'S 3,600,000 BLACKS . BUTLER ANNOUNCED BRITAIN'S DECISION : NO TERRITORY WOULD BE KEPT IN THE FEDERATION AGAINST ITS WILL . FURIOUS AT THIS " ACT OF BETRAYAL, " WELENSKY STALKED ANGRILY FROM BUTLER'S OFFICE AND PROMPTLY CANCELED A LUNCHEON ENGAGEMENT WITH PRIME MINISTER MACMILLAN, A SNUB WITHOUT PRECEDENT IN BRITISH COMMONWEALTH ANNALS . AT A NEWS CONFERENCE, HE STORMED THAT " THESE DECISIONS HAVE BEEN TAKEN BY HER MAJESTY'S GOVERNMENT UNDER THREAT FROM MEN WHO SEEK POWER . THE PEOPLE OF CENTRAL AFRICA, BLACK AND WHITE ALIKE, ARE BEING BETRAYED TO THESE MEN ! " SOUTHERN RHODESIA'S FIELD TOOK THE NEWS IN STRIDE . NOW THAT THE FEDERATION WAS VIRTUALLY DISSOLVED, FIELD WANTED A BRITISH GUARANTEE OF INDEPENDENCE FOR SOUTHERN RHODESIA, AND PRESUMABLY A GUARANTEE OF ITS CONSTITUTION, WHICH IS RIGGED AGAINST THE BLACK MAJORITY . UNTIL SUCH GUARANTEES ARE GIVEN, SAID FIELD, HE WILL ATTEND NO MORE CONFERENCES .