He appealed for witnesses who saw a blue lorry travelling from the Longstore towards Salerie Corner or a male cyclist wearing a yellow reflective jacket on a black bike travelling in the same direction.

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On the 9 p.m. boat ride back to Manhattan from New Jersey, Dan Dubno, wearing a reflective mylar jacket to keep out the chill of the Hudson, said that, even if there were no presentations or gadget demos, the event would have been a success because it brought people together to celebrate and forward innovation and creative tinkering.

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One, who may have run with a slight limp, was wearing a baseball cap with a cream or white peak, a light blue hip-length hooded jacket and reflective strips down the sleeves.

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