Last week Steve put an ad in the paper. It read as follows: “7th June, 6pm, time travellers party, The Fox and Saviour.” He had also left the instruction that time travellers must not let on that they are time travellers: if no one turned up, then the future-people would know that this was not a party worth going to, so they wouldn’t come. There would have to be a seed population of present-folk. Otherwise it would be impossible to get them there in the first place. Of course, there is then the downside that there isn’t really much point in bringing time travellers if you don’t know they’re time travellers, what’s the point in that? Steve arrived at 6:20pm, and by the time he got there, there were twelve people and no cheese twists left. No one polishes off 200 cheese twists in 20 minutes. Sound evidence, he thought, of time travellers. But he didn’t say this, just in case.