<His obituary on page 21 of the New York Times, 10 December 1934 included the following reference:

‘Known as an opponent of the Machado régime, he served for a few days as Provisional President in Cuba during the revolutionary crisis following the flight of the dictator.’

Page 165 of the December 1934 American Chess Bulletin carried a brief death notice:

‘Dr Manuel Márquez Sterling, who had held the post of Cuban Ambassador at Washington since January 1934, died in that city on 9 December, at the age of 62. Old-timers will recall the name of Dr Sterling as that of an ardent chess devotee at one time quite active in Havana, when he was a player of considerable ability. He was the author also of a text book on the game in the Spanish language. Dr Sterling was long in the diplomatic service of his country and, earlier in his career, was Ambassador to Mexico.’>

A. C. Vazquez wrote the following in El Fígaro and reprinted in El Ajedrez Magistral, v2, 1900, p35, regarding an aborted match between he and Sterling (translation by jnpope): "Four games had already been played (two draws and two losses by Mr. Marquez Sterling), when he had to leave suddenly for Washington, on account of having been appointed private secretary of Mr. Gonzalo de Quesada in everything concerning the representation of Cuba in the Universal Exposition of Paris. As a result, he was forced to resign the match, declaring us the winner."