Which vampire hunter has died during the mission to kill the Count? How do Jonathan and Mina honor this deceased character?

In his journal, Harker recounts the end of Renfield’s story: before escaping the asylum, the count pays one last visit to the lunatic, breaking his neck and killing him. Harker and his compatriots go to Carfax the next day and place a Communion wafer in each of Dracula’s boxes of earth, rendering them unfit for the vampire’s habitation. Before the men proceed to the count’s estate in Piccadilly, Van Helsing seals Mina Murray ’s room with wafers. When he touches her forehead with a wafer, it burns her skin and leaves a bright red scar on her forehead. Mina breaks down in tears, calling herself "unclean."