I’m sure everyone’s giggling over the reference to British civil engineer James Henry Greathead, who oversaw the excavation of some of London’s earliest deep level tunnels. The Greathead Tunneling shield that bears his name is a manually operated precursor to today’s tunnel boring machines; Doretta is obviously their descendant.

Her name is Doretta

Rock and Stone @Harold_Penisman@lemmy.world

I’ve got this one!