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[ The Red Virgin: Memoirs of Louise Michel , p. 65] March 18th, 1877, saw Kropotkin participate in a protest march in Berne which involved the anarchists "carrying the red flag in honour of the Paris Commune" for "in Switzerland federal law prohibited public display of the red flag." [Martin A. Miller, Kropotkin , p. 137] Anarchist historians Nicolas Walter and Heiner Becker note that "Kropotkin always preferred the red flag."