| Letter 1 (Dec.08.1998) | Letter 2 (Jan.10.1999) | Letter 1-2 |
| Letter 3 (Feb.11.1999) | Letter 4 (Mar.12.1999) | Letter 3-4 |
| Letter 5 (May.14.1999) | Letter 6 (Jun.09.1999) | Letter 5-6 |
| Letter 7 (Jul.10.1999) | Letter 8 (Aug.17.1999) | Letter 7-8 |
| Letter 9 (Sep.09.1999) | Letter 10 (Oct.14.1999) | Letter 9-10 |
| Letter 11 (Nov.11.1999) | Letter 12 (Dec.08.1999) | Letter 11-12 |
| Letter 13 (Jan.19.2000) | Letter 14 (Feb.12.2000) | Letter 13-14 |
| Letter 15 (Mar.17.2000) | Letter 16 (Apr.10.2000) | Letter 15-16 |
| Letter 17 (Jun.08.2000) | Letter 18 (Jul.15.2000) | Letter 17-18 |
| Letter 19 (Aug.15.2000) | Letter 20 (Sep.15.2000) | Letter 19-20 |
| Letter 21 (Oct.18.2000) | Letter 22 (Dec.21.2000) | Letter 21-22 |
| Letter 23 (Jan.20.2001) | Letter 24 (Feb.18.2001) | Letter 23-24 |
| Letter 25 (Apr.21.2001) | Letter 26 (Feb.19.2003) | Letter 27 (Mar.15.2003) |
| Letter 28 (Apr.21.2003) | Letter 29 (Nov.20.2003) |