I had the same with a DC8, 20 years ago or so. On this acft there's a single hydraulic circuit with a priority valve that allows hydraulic flight controls to be activated even with some hydraulic leaks.
Ourselves, we lost up to the last drop of skydrol on board... Servo-tab flight controls (hence DC = "Douglas Cable", or "Diesel & cable"
) at FL390, not much a matter, electrical back-up horizontal stabilizer setting, and.... one of my very best landings with that workhorse.
Then normal use of thrust reversers (pneumatic moved on the Jurassic Tube JT3D), and finally easy exit on a high-speed turnoff with differential braking, using brake pressure accumulator to bring the aircraft to a full stop.
A total non-event.
Then we just asked a tug to taxi in...