| Source: St. Louis, History of the Fourth City, 1763-1909, volume III (St. Louis: S.J. Clarke Publishing Co., 1909) Location: Reading Room / St.L. / 9 / St4 | |
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| Last Name: | Vahlkamp |
| First Name: | Helen |
| Maiden Name: | Hay |
| Death Date: | 1878 |
| Remarks: | Mentioned in a biographical sketch |
| Volume: | 3 |
| Page: | 635-636 |
