| Title | Paper | Date | Type | ||
|---|---|---|---|---|---|
| 251 |
 |
Mt. Pleasant Pyramid | 1918-01-25 | unclassified | |
| 252 |
 |
Mt. Pleasant Pyramid | 1919-01-24 | unclassified | |
| 253 |
 |
Mt. Pleasant Pyramid | 1919-01-24 | unclassified | |
| 254 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 255 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 256 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 257 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 258 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 259 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 260 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 261 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 262 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 263 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 264 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 265 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 266 |
 |
Mt. Pleasant Pyramid | 1920-01-16 | unclassified | |
| 267 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 268 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 269 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 270 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 271 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 272 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 273 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 274 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified | |
| 275 |
 |
Mt. Pleasant Pyramid | 1920-01-23 | unclassified |