In June 1927, Mary was living in 69 Tremont Street – the house where her eldest brother Patrick lived at the time of the 1930 census – and submitted an application for citizenship. She signs the form, confirming her readiness to renounce allegiance to King George V and that she is neither an anarchist or a polygamist!
| First name(s) | Mary |
| Last name | Sullivan |
| Birth year | 1901 |
| Birth date | 25 Feb 1901 |
| Birth country | Ireland |
| Birth place as transcribed | Cork, Ireland |
| Event year | 1927 |
| Event type | Declaration of intention |
| Event state | Massachussetts |
| Event place as transcribed | Charlestown, Massachusetts |
| Description | Naturalization records (Boston, Massachusetts) NARA, RG 21 |
| Declaration | 196716 |
| Country | United States |
| Record set | United States Naturalization Petitions |
| Category | Travel & migration |
| Subcategory | Naturalizations |
| Collections from | Americas, United States |
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