One of the people special prosecutor Arthur Christy's investigators would like to interview out in California about White House chief of staff Hamilton Jordan's much-publicized visits there in 1977 is Siebo (Mickey) Chung.

Chung spent considerable time with Jordan and his entourage during two visits to Los Angeles during the month of October that year.

But Chung is ill with cancer. He told a reporter recently that he hopes his attorney can persuade Christy not to put him through the ordeal of an intensive interrogation.

Chung has already been through a preliminary interview with FBI agents who were assigned to check out allegations that Jordan had sniffed cocaine in California.

But Christy's investigators, who are currently in California, are seeking much more probing, detailed questions than the FBI did, according to another prospective witness who was interviewed earlier this week. "Contrary to the FBI, who really didn't seem to want to find out anything," the source said. Chung told a reporter during one short interview several months ago that the FBI had never asked him about some indicidents that occurred during those trips and may, in fact, not know about them.

Chung, half Japanese and half Chinese, runs political errands for industrialist Leo Wyler, who gave one of the 1977 Beverly Hills parties for Jordan at which cocaine was allegedly used.

Chung served as a kind of unofficial welcoming committee and social guide during visits by Jordan on the weekends of October 7 and 22.

First Lady Rosalynn Carter took an old friend from Plains, Ga., through the family quarters at the White House yesterday.

It must have been "a long time" since we've had a president and first lady who were voracious readers, Mrs. Carter said, pointing out that White House carpenters have had to build a bookcase along one wall of the Carter's informal sitting room. Even with the new shelves, books are stacked everywhere.

Over in the West Wing, President Carter took the visitor into his private, inner-sanctum office for a peek at his proudest new possession. It's an oil portrait of his wife as a little girl, wearing a white bow in her hair. An admirer painted it from a photograph and gave it to the first lady when she was out campaigning. Her husband claimed it for his office.

Informed sources from Panama say that all the shah of Iran's children have been summoned there, lending new credence to reports that his health has worsened.

The children were scheduled to arrive there late on Wednesday, the sources said.

The same sources claim that White House chief of staff Hamilton Jordan arrived in Panama on an undisclosed mission two days before the shah was supposed to have undergone an operation. Jordan did not return to Washington, the sources said, until after the shah's doctors had decided to delay surgery on his spleen and he had returned to the island of Contadora.

CBS had reported last week that Jordan was in Panama, but the White House declined comment then and now.