Christopher Anvil

gravitically adv.	1958 ‘C. Anvil’ Foghead in Astounding Science Fiction Sept. 43/2 THIS AMOUNTS TO ITS BEING CORRECTLY POSITIONED GRAVITICALLY…IF NOT LEVEL IT CANNOT FUNCTION.
jump point n.	1964 ‘C. Anvil’ Bill for Delivery in Analog Science Fact–Science Fiction Nov. 76/2 It makes it kind of rough if, through no fault of your own, the gravitor gives out before its triple-clad warranty period is up, or a jump-point slides out of congruity and hangs the ship up in the middle of nowhere for a month.