| Source: Necrology scrapbooks, Volumes 1-32 Location: Reading Room / St.L. / 920 / N28 | |
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| Last Name: | Helfenstein |
| First Name: | Mary |
| Middle Name: | A. |
| Title: | Mrs. |
| Death Year: | 1890 |
| Age: | 71 |
| Volume: | 2C |
| Page: | 37 |
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