Garrett told reporters yesterday that an employee of the CFIA library had seen the pair near the library on the Center's third floor at about 4 p. m. Monday afternoon. When she asked if she could help them, he said, she was met with a curt refusal.

Later, checking the officer on the third floor before leaving, he said, she noticed a grey metal box- similar to one that the girls had carried in- in a desk drawer in Bletz's office.

Garrett traced the explosion to the desk.

Witnesses who had seen the Center's third floor- sealed to the public since early yesterday morning- said that the explosion had demolished the non-supporting walls, broken through the ceiling and into the attic, and stripped the plaster away from supporting walls, leaving curved, petal-shaped scars.

After stating that the damage would be much less than the $40,000 figure, Cox said that Harvard is a self-insuring corporation and that the Center carried no commercial insurance. "We will make the library available for use as fast as we can," Cox added.

Asked about the damage, Lester E. Gordon, director of the Center Development Advisory Service, said, "A good portion of the University's core library on underdeveloped countries has been destroyed."

President Pusey issued a statement yesterday afternoon which called the bombing "a senseless attack upon the entire University." He added that he was "confident the entire University will draw together in pursuing its work, sobered, thankful there was no loss of life."