Here is the best that I can source:
One of a series of poems about wool on the London Underground in the 1970’s, was submitted by Theresa Sundt.
It read -
King Arthur’s Knights sat sullen eyed.
“What ails thee all?” the Monarch cried.
Said one, “It’s this round table, sire.
The lads out there can’t feel the fire.
”Quoth Guinevere, “Poor faithful knights,I’ll knit them all a pair of tights.
”Morale was saved, which proved the rule:
There is no substitute for wool
https://www.stitchandstory.com/blogs/latest-news/16474764-king-arthur-s-knights-sat-sullen-eyed-what-ails-thee-all-the-monarch-cried-said-one-it-s-this
Once upon a time, before TV reduced attention-span to 30 seconds or less, an advertising campaign based on historical figures appeared on the London Underground. It was one of those rare occasions when the public enjoyed being able to suggest their own strokes of genius to the advertiser, and, even rarer, a new sentence entered the language. The tag-line on which all the posters ended was: There is no substitute for wool.
http://www.thereisnosubstitutefor.co.uk/
