 To evade Bavarian police, Lenin moved to London with "Iskra" in April 1902, there becoming friends with fellow Russian Marxist Leon Trotsky.In London, Lenin fell ill with erysipelas and was unable to take such a leading role on the "Iskra" editorial board; in his absence, the board moved its base of operations to Geneva.The second RSDLP Congress was held in London in July 1903.