I am now suffering from
Danny42C-induced stress, as I can't locate my chinagraph pens. They are in a rigid plastic case [originally the retail pack for some small cigars] so that the waxy tips didn't stain my shirt pocket. And there are 4 of them in there ... black, white, yellow and red. I can only assume they have migrated to the attic somehow.
Oh, well, looking for them will help pass the time, once I've washed the car and done some weeding