Maria Ulyanova (Lenin’s sister) later wrote in a letter to the presidium of the July (1926) Joint Plenum of the Central Committee and the Central Control Commission of the R.C.P.(B.), at which the question had been raised by G. Y. Zinoviev, one of the leaders of the “new opposition”, that Stalin had offered his apologies.
Here’s the letter from Lenin to Stalin after this incident happened.
Maria Ulyanova (Lenin’s sister) later wrote in a letter to the presidium of the July (1926) Joint Plenum of the Central Committee and the Central Control Commission of the R.C.P.(B.), at which the question had been raised by G. Y. Zinoviev, one of the leaders of the “new opposition”, that Stalin had offered his apologies.