He declined to comment of his reasons for leaving.

A source close to Banfield said that while Blustein unaided and alone couldn't move him an inch," the light penalty imposed upon her was "a consideration" in his decision to leave.

He said Banfield's current work on urban affairs with James Q. Wilson, Shattuck Professor of Government is another factor in his return.

Banfield probably won't tell the real reasons for his return to Harvard and "will cook some up for the Provost," the source said.

Harvey C. Mansfield, chairman of the Government Department, said last night, "We're delighted to have him back. He's one of the half dozen most distinguished men in his field."

"He was always very popular here, drawing over 700 students to one of his classes," Mansfield said.

He confirmed that the department has approved Banfield's appointment under the policy that "anyone who has been in the department can return."

Mansfield said that the Blustein incident "could possibly have something to do" with Banfield's decision