| Title | Paper | Date | Type | ||
|---|---|---|---|---|---|
| 426 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 427 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 428 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 429 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 430 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 431 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 432 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 433 |
 |
Mt. Pleasant Pyramid | 1922-04-14 | unclassified | |
| 434 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 435 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 436 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 437 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 438 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 439 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 440 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 441 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 442 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 443 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 444 |
 |
Mt. Pleasant Pyramid | 1922-04-21 | unclassified | |
| 445 |
 |
Mt. Pleasant Pyramid | 1922-04-28 | unclassified | |
| 446 |
 |
Mt. Pleasant Pyramid | 1922-04-28 | unclassified | |
| 447 |
 |
Mt. Pleasant Pyramid | 1922-04-28 | unclassified | |
| 448 |
 |
Mt. Pleasant Pyramid | 1922-04-28 | unclassified | |
| 449 |
 |
Mt. Pleasant Pyramid | 1922-04-28 | unclassified | |
| 450 |
 |
Mt. Pleasant Pyramid | 1922-04-28 | unclassified |