After 4½ months negotiators shook hands. The Dutch will turn West Irian over to U.N. stewardship until next May 1, at which time administrative control of the territory will pass to Indonesia.

Over the roads near Middleburg, Va., a convoy of limousines daily moved into a lavish colonial estate called Huntlands, only three miles from President Kennedy’s winter weekend spot, Glen Ora.* Shielded from prying eyes by a high, cream-colored brick wall, diplomats from The Netherlands and Indonesia met with U.S. Mediato…