A Pennsylvanian Alamo defender, Robert Crossman was born 1810 in Pennsylvania. HIs father, Samuel Vinson Crossman (b. 19 Dec 1784- Dec 18, 1813) in Taunton, Massachusetts was the second son of Ebenezer and Mercy Crossman.  Once Robert reached New Orleans
Robert Crossman traveled to Texas via New Orleans, arriving in 1829. There he joined the New Orleans Greys, his commanding officer was Capt. Thomas H Breece.The Greys with Robert marched across Texas to San Antonio de Bexar, arriving in time for them to serve in the Siege of Bexar in latter 1835. Crossman was wounded in this battle. 
Robert Crossman traveled on to Texas with the New Orleans Greys. His commanding officer was Capt. Thomas H Breece.
In 1836 after that Siege of Bexar, Robert Crossman, rifleman was then assigned to the infantry company of Capt. William Blazeby and served in the Alamo garrison. 
:GLO records show the State of Texas awarded Land Bounty to heirs: #84 1/3 League for having been with Col Travis in the Fall of the Alamo, issued June 12, 1851.
::The heirs of PVT Robert Crossman (Crosson) were awarded Donation Certificate -1) 640 Acres 17 June 1851 for having fallen in the Alamo. 2) Donation Certificate - 640 Acres 4 Nov 1859 for his havinq been in Siege of Bexar and 3) Bounty Warrant for 1920 Acres - land patent to heirs in Bosque and Archer Counties. 
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