信鴿

信 = 亻 + 言 : Marie Curie and Rosa Luxemburg are reading a letter of Karl Marx to the public in the encampment's bathroom. To make the message really come across to the people they use a megaphone.

鸽 = 合 + 鸟 : Guy Fawkes (g) is experimenting with creating new messengers for his secret underground network in front of the elevator (e1) by gluing (合) a dove (鸽) to a turkey (鸟). The idea behind the experiment is that they can fly in turns.