Hello Ron,
Gaicoe sounds like an Ancestry transcription of grieve. Have seen worse.
From “A general view of the coal trade of Scotland, 1808.
https://books.google.com.au/books?id=Dz ... al&f=false
“When, therefore, a cart is to be filled with these coals, the round coals are laid aside, and a labourer, with a riddle of an inch mesh, separates the dross from the small cubic pieces of coal. Those coals which keep above the riddle, are thrown into the cart, and the quantity of this kind is regulated by the general quantity of small coal which the seam yields in working, which in practice is easily ascertained. The round coals are put on next, and built in a very firm manner above the mouth of the cart, a mode in which the Glasgow carters are very dexterous. The weight of the cart having been previously ascertained, the weight of the coals are adjusted on a steelyard, by the
hill-grieve, and thus delivered to the consumer.“
Steelyard balance.
https://en.wikipedia.org/wiki/Steelyard_balance
“Even larger steelyards were three stories tall and used to weigh fully laden horse-drawn carts.”
Hope that helps,
Alan