G'day, GUEST,Sheepish squeezer's wife,

Had the reeds popped out after sharp handling (well ... being firmly dropped ...) you could match up each reed plate's position and orientation by carefully matching patterns of wax still on the frame and wax sticking to the reedplate. Then, with a combination of luck and care, you might be able to wax them back into place with Rowan's hot blade. (I would favour the handle end of an old-fashioned EPNS (soup?) spoon ... one of those with a heavy end to give you a firm steady grip.) This gives you a lot more stored heat, to allow a firm (re-)attachment. If too much wax had gone astray, you might need to 'top it up' on one of the surfaces too assure a good seal.

Unfortunately, if the wax has got so hot it completely melted this evidence may have melted with it. The ruler measurement suggested by EBarnacle (under Lady Hillary's log-in!) is not accurate enough to identify the reed-plates - pitch is determined by more tuning factors that mere length.

The best bet is to rig up a wind source (from a bellows or from the exit of a vacuum cleaner) to a slot over which individual reeds may be sounded. (The reed should be blown from the side away from the leather / plastic valve.) A cheap tuning meter (full-scale, not a guitar EAdgbe model) should give you enough identification to work out which pair ... from which row ... and the up and down sides. (Well, it might need someone who knows the exact layout ... if you are an "ear-player".)

Once you have a convincing order partly confirmed by a tidy progression of reed-plate sizes - or reed lengths) you should be safe to start re-waxing the reedplates in!

Have fun (and keep the box away from all sources of heat!

Regards,

Bob