<Tr> <Td> Theatrical (show) <Ul> <Li> Costumed character </Li> <Li> Creature suit </Li> <Li> Dance costume </Li> <Li> Domino mask </Li> <Li> Fursuit </Li> <Li> Gorilla suit </Li> <Li> Kumadori </Li> <Li> Leotard </Li> <Li> Pantomime horse </Li> <Li> Stage dress </Li> <Li> Titan the Robot </Li> </Ul> </Td> </Tr> <Ul> <Li> Costumed character </Li> <Li> Creature suit </Li> <Li> Dance costume </Li> <Li> Domino mask </Li> <Li> Fursuit </Li> <Li> Gorilla suit </Li> <Li> Kumadori </Li> <Li> Leotard </Li> <Li> Pantomime horse </Li> <Li> Stage dress </Li> <Li> Titan the Robot </Li> </Ul> <Li> Titan the Robot </Li> <Tr> <Td> Period (show) <Ul> <Li> Plague doctor costume </Li> <Li> Modern dress </Li> </Ul> </Td> </Tr>

Why did the tradition of fancy dress for halloween begin