Sylvester Sage Crosby
- Born: 2 Sep 1831, Charlestown NH
- Died: 18 Aug 1914, Cambridge MA
General notes:
Watchmaker
Events in his life were:
- He appeared on the census in 1850 in Boston MA. Listed as a clerk in his brother's home.
- He worked in 1855-1880 as a watchmaker in Boston MA
Listed in various city directories at 69 Washington (1855), 240 Washington (1860-1872), and 444 Washington (1875).
- Partnership: Horatio Towne, circa 1860, in Boston MA. As CROSBY & TOWNE.
- He appeared on the census in 1865 in Boston MA. Listed as a watchmaker.

- Example: Tradecard, circa 1870, in Private Collection.

- Example: Tradecard, circa 1870, in Private Collection.
- He appeared on the census in 1870 in Brookline MA. Listed as a watchmaker.
- He appeared on the census in 1880 in Cambridge MA. Listed as a watchmaker.
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