Autograph note signed by George Bush, appearing at the bottom of a typed letter signed by Barbara Bush, thanking Arthur Ashe for his ''generous contribution'' to Bush's 1988 campaign. George Bush's note reads in full: ''P.S. Barbara showed me your wonderful letter. So many thanks - George Bush''. Single-page letter is on Barbara Bush's personal stationery, measuring 6.5'' x 8.5''. Fine. With an LOA from Arthur Ashe's widow.