"Well," says Shell Bell. "We can experiment and make tentative conclusions, provided we don't expect them to hold every time. But it would be really convenient if we had a way to communicate in Panem, too. Especially since it's otherwise going to be hard to coordinate service sales. In theory I can take down room numbers and Tony can leave whatever he makes as an inter-room package for the next time the customer reappears. I don't think assassinations can be made to work the same way. Do you do anything else?" Bell asks Sherlock. "Anything... portable."