drams ran from Dolyhir quarry carrying burnt lime to the South Wales steelworks in the 1800’s.
Thanks for the additional information , Dave.
Couldn`t quite visualise “Harry” worse for drink when in charge of some big heavy shire horses. 
so we’re now onto horses
they all have horse power
not donkeys then
but oxen can also provide motive power
all have pto from engine now, no need for donkey engine
please turn over■■?
power take off 
to a better place
where the sun always shines
and the birds sing
like Harry Secombe, if I ruled the world…
or Aled Jones walking in the air
or give me sunshine, when its actually raining
when you smile
which is quite often, in my case 
and me
jolly well done
although upset these last few weeks cos of my best friend dieing 