0000354204-99-000137 SC 13G 1 19990211 CELADON GROUP INC 0000865941 4731 133361050 DE 0630 SC 13G 34 005-45287 99531675 ONE CELADON DR INDIANAPOLIS IN 46236-4207 2129774447 ONE CELADON DRIVE ONE CELADON DRIVE INDIIANAPOLIS IN 46236 DIMENSIONAL FUND ADVISORS INC 0000354204 0000 22370029 IL 1231 SC 13G 1299 OCEAN AVE 11TH FLOOR SANTA MONICA CA 90401 3103958005 1299 OCEAN AVENUE 11TH FLOOR SANTA MONICA CA 90401 SC 13G 1 000035420499000137-001-seq1-sc-13g.txt 1998 SCHEDULE 13G - CELADON GROUP INC