Not entirely true, Henrietta. There are a few facilities that specialise in teleportation-through-time technology - Alaska, the Negev plant, and, if my memory serves me well, one hidden in plain sight under the Swiss Alps, disguised as a particle accelerator. However, they're not particularly operative, what with their necessary destruction of all matter that passes through.

'Interrogation' of the priestly git downstairs might aid efforts in reopening a portal, if that is what you'd like ...

She brightens, remembering her manners.

although I am sure that the master would be delighted to have you stay!