William Loeb, the conservative publisher of the Manchester, N.H., Union-Leader, confirmed yesterday that he had helped expedite payments from government agencies to Jessie L. Gill, an FBI informer who was close to Harvard SDS in the late 1960s.

The Crimson yesterday also reached Gill, who said she had offered her services to both the FBI and the Central Intelligence Agency beginning in January 1967 and had given the two agencies the names of "thousands" of radicals.

Loeb said he had "taken the appropriate steps in Washington" to insure that Gill was paid for her work. Asked whether these steps included contacting New Hampshire's two Congressmen, he responded, "I know a great many Congressmen."

No Personal Meeting

He said he never met Gill and had no idea whether she was paid by CIA agents, as she said yesterday. He said the matter was brought to his attention by a staff member and he offered his assistance.

Loeb called Gill's work as an informer "very healthy" and "a very good idea."

"In the late 1930s I penetrated the Communist Party on my own," Loeb said. "Anybody that says there is no such thing as the Communist conspiracy is crazy."

Communist Control

SDS is "by and large controlled by Communists," Loeb said.

Reached in New Hampshire, Gill readily acknowledged her role as an informer for both the FBI and the CIA. She said she was "positive" that Herman A. Mountain, chief of the CIA's Cambridge office, was one of two Agency agents who she said paid her $350 in her North Conway, N.H., home on March 3, 1972.

Mountain yesterday refused comment on any aspect of the case. He referred questions to the CIA's headquarters in Langley, Va.

Angus Thuermer, assistant to the CIA's director, yesterday declined comment on any aspect of the case. "We don't usually comment on any of our activities," he said.

Gill said the FBI had paid her steadily, although she said her salary was "under the minimum wage." She said the CIA had owed her the $350 for hundreds of phone calls she had made to the Agency officers in both Cambridge and the national headquarters.

She said she approached Loeb through Carol Morrissey, a Union-Leader correspondent, and that he helped her get her money. She said she has never met Loeb.

Gill said a letter sent by Rep. James C. Cleveland (R-N.H.) to the late J. Edgar Hoover, former FBI director, was probably sent to the wrong person. The Crimson published a letter from Hoover to Cleveland Tuesday that revealed Gill's role as an informer, and another letter from Cleveland to Loeb referring to the Hoover letter and asking if the Representative could be of further assistance was published yesterday.