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Hawking (1974) and Page and Hawking (1976) investigated theoretically the possibility of detecting high energy gamma rays produced by the quantum-mechanical decay of a small black hole created in the early Universe. They concluded, that at the very end of the life of the small black hole, it would radiate a burst of gamma rays peaked near 250 MeV with a total energy of about 10$^{34}$ ergs in the order of a microsecond or less. The characteristics of a black hole are determined by laws of physics beyond current knowledge so whether this theory, or another, is correct is unknown. Earlier attempts by the SAS-2 high energy gamma ray telescope and ground-based vvery high energy gamma ray have set limits on these possible bursts. The Compton Observatory EGRET has the capability of detecting such bursts at a much fainter level than SAS-2, and a continuing search of the EGRET data is being made. None have yet been seen.
\noindent{Hawking, S. W., 1974, Nature, 248, 30}
\noindent{Page, D. N., and Hawking, S. P., 1976, ApJ, 206, 1}
