A journalist from London, whom Ogilvy encounters on the road after first seeing the Martian cylinder. Henderson is the first person to actually believe Ogilvy about the cylinder, and he hurries to see for himself. He then goes to the train station and sends a telegraph to London about the mysterious arrival. Along with Ogilvy, Henderson is part of the group of men who approach the cylinder with a white flag in the hopes of communicating with the Martians. Like Ogilvy, though, he is quickly scorched to death by the Heat-Ray.