Lots of dead leaves on the gravel.
Seem to recall the groundkeepers at school had a sort of flamethrower
thingy like a teapot with a 3-foot spout. Parafin in the 'pot' part,
pump it up, release valve slightly, light end of spout, point at
leaves open valve some more, burn off leaves, turn off valve. left a
little ash but all the leaves went.

Any idea what it's called & where one could instruct one's man to
obtain such a device ??

salud!