Rainham Builders
Family: John J. Mason / Alice Mason Grosvenor (F211748)
m. 26 Jun 1867Rosa Anne Mason (1817-1872) 
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William Grosvenor (1838- )  |
| James Brown Grosvenor (1840- ) |
| Amasa Mason Grosvenor (1841-1841) |
| Robert Grosvenor (1847-1879) |
| Eliza Howe Grosvenor (1849-1853) |
| Rosa Anne Grosvenor (1855- ) |
| Alice Mason Grosvenor (1842-1886)
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