Birth of a joke

Chris Blenkarn puts me right on the originator of the 'What are you doing in my garden?' joke. It wasn't Steven Wright, but Michael Redmond, and the origin of it is recounted here:

It is 1988 in some underground, underlit London comedy club. A prematurely aged Irishman stands on stage, dressed in a shabby long brown mac, all bloodhound eyes and a droopy Wild West moustache, and utters another in a beautifully understated seam of immaculate one-liners. "A lot of people say to me, 'Hey you'," pauses, makes almost imperceptibly small gesture of dismissal "'what are you doing in my garden?'" The audience takes a couple of seconds to catch up, and then dissolves into hysterics. The man is Michael Redmond.
.....
Musical comedian Jim Tavare says he can remember the exact moment of the birth of "what are you doing in my garden?" In the summer of 1987, he and Michael Redmond had been performing at the Screaming Beavers comedy club in Macclesfield and were staying at Tavare's parents' house in Prestbury. Looking out of the window while they were sitting in the lounge drinking tea, Jim, Michael and Jim's brother saw a distressed man running around in Jim's parents' garden. According to Jim, they rang the local mental hospital, who sent someone around to pick up the escapee. Later that evening, Redmond wrote his legendary gag. Redmond himself, however, has no memory whatsoever of thispeculiar incident, which made such an impression on Tavare, but recalls the thought processes by which he arrived at the line. "I'd been worrying at the idea for ages. I thought of 'Hey, you, what are you doing in my kitchen?'," he says, "but that seemed like too much of an invasion of privacy, too threatening. I changed it to 'garden' and it worked."