Many theories have been proposed to ascertain the nature and identity of Spring Heeled Jack. The urban legend of Spring Heeled Jack gained immense popularity in its time due to the tales of his bizarre appearance and ability to make extraordinary leaps, to the point where he became the topic of several works of fiction.

Spring Heeled Jack was described by people claiming to have seen him as having a terrifying and frightful appearance, with diabolical physiognomy that included clawed hands and eyes that "resembled red balls of fire". One report claimed that, beneath a black cloak, he wore a helmet and a tight-fitting white garment like an "oilskin". Many stories also mention a "Devil-like" aspect. Spring Heeled Jack was said to be tall and thin, with the appearance of a gentleman, and capable of making great leaps. Several reports mention that he could breathe blue and white flames and that he wore sharp metallic claws at his fingertips. At least two people claimed that he was able to speak in comprehensible English.

THis of course rules out Kendall, and Rapaire. It might have been me, but you will recall that several people here n the 'Cat have complained my English was incomprehensible.

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