1. Rock Hound A. Stamps
2. Folk Singer B. Recipes
3. Numismatist C. Timetables
4. Ham Radio Operator D. Coins
5. Cook E. Old furniture
6. Lexicographer F. Call numbers
7. Philatelist G. First editions
8. Antique Collector H. Ballads
9. Railroad Buff I. Obsidian
10. Book Lover J. Words
(Answers: 1. I, 2,H 3,D 4,F 5,B, 6,J, 7,A 8,E 9C,10,G)