Can anyone provide information about when (time period) the British Army Highland Regiments officially (or otherwise) adopted the little kilt or the more modern kilt we know today, and discarded the great kilt. i opine it was sometime between the Napoleonic and Crimean wars (or earlier?), but this covers about 56 years and i was hoping someone might help me to narrow the period and make this number more manageable. Or correct me if my opinion is in error.

Thanks in advance to all who contribute.

Jacques