Whilst carrying out my research into these HG Wellian devices I came up with a little theory.
Did no3 Column have its own battery?
If all we had to go on was the manual of Feild Operations then the answer would be yes.
The rocket cart that I have mentioned on the other thread could have been Russells, arriving with the baggage but COULD it have been Chelmsfords?
It seems odd that columns 1, 2 and 4 all had rocket capability but the main column didn't.
Looking at N batteries history before the Zulu war theres no mention of rockets.
However if you look at batteries arriving from England after Isandlwana it talks of them picking up rockets from depots.
Could they have picked them up from depots?
More teneuous, I think its Mehklakazulu talks of them having trouble with the troughs and couldn't get them to fire.
Probably Russell hes talking about BUT Russells did fire.
Just because they weren't mentioned by anyone doesn't mean they weren't there. For example how many eye witnessess from Hlobane testify Tremletts trough getting one away (or even being up there)
Did the officer commanding No3 coloumns troughs ride out with Chelmsford hence they were never deployed?
Could Smith have been in charge of them and when he arrived back in camp didn't have time to deploy them being pre occupied with the guns.
I've got a few other bits and pieces that could muddy the water regarding this.
As I say this is very tenuos and I don't have any hard evidence to back it up but its tantalising all the same.