"As vices go, I think it's a safe one to try out." His eyes crinkle up in a smile. "Yes, here, let me show you--" Lesgle opens up the little rough-paper book and gives a more detailed explanation. These grids here, see, and this larger grid, and you don't repeat the digits this way or that way, etc., etc. "Er. And I asked the Bar for a book of crossword puzzles in a suitable language. It's amazing how much you can talk with someone here and not know what language they speak."