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                                    April 20, 1976

Dr. C. Gray
Geology Department
La Trobe University
Bundoora, Australia 3083

Dear Chris,

    In reply to your letter of April 14, let me give you a little background on the Pena Blanca Spring meteorite. It fell in a waterhole (used locally as a swimming pool) on a ranch in west Texas in 1946. The ranch owner has never been willing to part with it, and the main masses are I believe stored in a closet in his home in San Antonio. Our 400-gram piece seems to be the largest fragment in a museum. To provide you with a 10-gram interior piece would involve breaking up the entire specimen, and this we are reluctant to do.

    Why must you use Pena Blanca Spring in your projected research? If all you need is a second enstatite achondrite, Norton County would be a natural. I think we could supply you with a 10-gram internal fragment from this meteorite.

                                 Sincerely yours,

                                 Brian Mason
                                 Curator
                                 Department of Mineral Sciences

BM/kp