Former attorney general John Mitchell has begun a new career in a company called Global Research International Inc., which has subleased office space at 2550 M St. NW.

The firm, incorporated five months ago in Delaware, is chartered to assist and advise those seeking to do business with foreign governments or foreign commercial enterprises.

A former Marine Corps officer, James M. Tully, works out of the office with Mitchell.

Both decline to discuss their new venture. But a competitor said this week that the firm reportedly plans to open offices in New York and San Francisco soon under different corporate identities.

Former president Richard M. Nixon is expected to have "input" in the New York operation, according to the same source.

The late Supreme Court Justice William O. Douglas, a man of many talents, had a secret avocation.

He wrote plays under the nom de plume "William Frasier."

One unpublished play, "On The Couch," is mentioned in his will. So is an unpublished book entitled "Forever," written especially for his wife, Cathy, and now owned by her.

Billy Carter has a houseguest in Plains, Ga., who wants him to run for governor and is willing to finance his campaign.

California cotton-grower George Belluomini, of Bakersfield, who owns banks, among other things, became Billy's buddy when he came out to promote one of the Belluomini family's business ventures -- the Aggies, a women's softball team.

At a dinner party here recently, former secretary of state Henry Kissinger's wife, Nancy, was explaining why he feels so strongly about this country's obligation to offer the deposed shah of Iran refuge.

As a former refugee himself, Kissinger takes very seriously the inscription on the Statue of Liberty promising sanctuary, his wife said.

Kissinger himself later told the guests in one word how he feels about the shah settling in Egypt: "No."