The strange events began in autumn 1931, when the Irvings noticed an unusual animal in their farmyard, being, as Price’s correspondent described: “similar in appearance to a weasel, with small body, long bushy tail, flat nose, and yellow in colour”. Oddly, this animal did not appear to alarm the chickens. Later, it was seen inside the house, as James Irving described: “This eerie weasel, as I thought he might be, then began to keep us awake at night by blowing, spitting and growling behind the matchboard partition of the lower rooms…”
The entity quickly progressed to something more sophisticated. Having learned to mimic various animal noises, it then began to repeat nursery rhymes, and within a short while – having built up a sufficiently wide vocabulary – it could converse with the family. Its voice is said to have been loud, clear, and one or two octaves higher than a human’s. Other witnesses describe it as a “very high, screechy sort”.
Initial news reports spoke of the ‘man-weasel’ farm, and indeed, the entity itself, when asked who or what he was, would frequently reply: “I am the ghost of a weasel, and I will haunt you with weird noises and clanking chains.” It was only later on that he described himself as “just a little extra, extra clever mongoose”.
Newspapers printed stories about Gef, although when reporters visited the farm, he tended to disappear. Some considered him a poltergeist or a shape-shifter. It was later thought that the Irving's teenage daughter, Voirrey, provided the voice of Gef, but she never admitted to a hoax. Link