Ball in bunker lost

[Colin L]

Thanks for that. It's such a specific instance that I'm unlikely to ever remember!

Decision 13-4/37 covers it.
http://www.usga.org/Rule-Books/Rules-of-Golf/Decision-13/#d13-4-37

 

[backwoodsman]

Except as provided in the Rules, before making a stroke at a ball that is in a hazard (it's not in the hazard)

(whether a bunker or a water hazard) or that, having been lifted from a hazard, (it hasn't been lifted from a hazard)

may be dropped or placed in the hazard, the player must not: ......

Thanks. And Colin for pointing out decision 13-4/37. But I've realised the reason I was "not seeing it" was on unrelated grounds which I have resolved in my mind. Your previous comment "read carefully" helped. Damn these rules - they make my head hurt sometimes.