:P
Murray's top seller for ages was Erinmore and other companies tried to copy the flavor trying to woo away loyal Erinmories,
but most attempts failed, and I think this document is trace of such a failure.
Perhaps closest to cracking the code, was Wills, who had iniated a cloak & dagger sounding enterprise known as "Project Shamrock" inwhich they tried to develop an Erinmore match-blend,
but I think that for the most part, their attempt was futile.
This doc is from the Imperial library, straight from the Scientific Control Laboratories, and illustrated the intense scrutiny, and the tremendous resources, of a big old company like Wills had, and how absolutely thorough they were when developing their tobacco blends.
I take "headspace" to mean "nose upon opening" ?
One of the most intense experiences I've yet had with pipesmoking, as far as an overwhelming flood of flavor, has been smoking an early 70's tin of Erinmore Flake as made by Murray's --- my palate was caught unawares, unprepared for such a highly concentrated blast of potency, and I admit that I was bewildered by it, enjoying it for its dark fullbodied depths, yet overpowered by its singular aroma.
You think that the Kendal scenteds are forceful, then you ain't smoked no Murray's Erinmore because that Belfast bouquet is absolutely all-consuming!
And the sample that I smoked was at least 40 years old!
