Sylvanus M. Spencer Nicaragua Filibuster Campaign (1819-May 29, 1862)

Murder at Sea, Albany Evening Journal, July 28, 1855, 2
Murder at Sea, Springfield Republican (Springfield, MA), July 28, 1855, 5
Murder at Sea, Boston Daily Atlas, July 28, 1855, 2
The trial of Sylvanus M. Spencer, Newark Daily Advertiser, Dec. 20, 1855, 2
Murder on the High Seas, New York Times, Dec. 20, 1855, 2
Murder on the High Seas, New York Times, Dec. 21, 1855, 3
Murder on the High Seas, New York Times, Dec. 22, 1855, 3
Later from Nicaragua: Arrival of James Adger- Walker's Case Hopeless, New York Tribune, Jan. 26, 1857, 5
Who is Sylvanus Spencer?  New York Times, Jan. 28, 1857, 1
Sylvanus M. Spencer to Juan R. Mora (enero 28, 1857)
The Emigration to Nicaragua, New York Herald, Jan. 29, 1857, 1
Important from Central America, New York Herald, Jan. 29, 1857, 1
President Pierce Among the Filibusters--Curious Developments, New York Times, Feb. 9, 1857, 4
The News from Panama, Daily Globe (San Francisco), March 3, 1857, 2
Captain Spencer's Return-- His Opinion on Affairs in Nicaragua, Philadelphia Inquirer, March 31, 1857, 2
The Nicaragua Deserters: Daniel McGuiness to Capt. Spencer, New York Herald, April 3, 1857, 1
Arrests on the Charge of Slander, Sacramento Daily Union, Oct. 31, 1857, 3
Col. Cauty Pronounces Capt. Spencer a Traitor, New York Herald, Feb. 28, 1858, 1
Claims Against Costa Rica: Convention Between the United States and Costa Rica of July 2, 1860
Died, New York Tribune, June 2, 1862, 5

Vargas Araya, Armando. "El mercenario Sylvanus M. Spencer: un caso de malinchismo historiográfico,"Revista Comunicación, 2010