A "graveyard bucket"? Interesting I never heard it referred to that
way. It was usually welded to two of the buckets teeth I think.
Nothing to add to these excellent posts. I recently see that there are
trench wall supports with braces available in aluminum for rent. At
the same rental were 6 foot high post hole digger I enquired about.
They said they are used often in utility work, Funny walking up to a
post hole digger as tall or taller than you. There are actually a
variety of post hole digger designs made in the United States I was
surprised by, i.e. some one side stationary, etc., and other
configurations. One I liked the most was made of steel tubing and
double crossed on the way to the shovel ends and could go to depth
with little lateral movement. U-Haul once rented them. It allowed one
to stand in a stone well and dig into the gravel fill from the nearby
Dutchess Quarry. One aluminum pitcher was at the bottom when it was
finally cleared around by heavy equipment, and as a tower it fell
over, strange way to look at a dry laid well.

George Myers