Plot explanation. Why was one vanishing cabinet at Hogwarts and the other at Borgin and Burke's?

Question

Who put one in Hogwarts and the other in the shop? They were both there since the beginning in H.P.C.S, probably even before then. One, Harry tried to hide inside when he's hidding from the Malfoys.

H.P.C.S Chapter 4 page 50

Harry looked quickly around and spotted a large black cabinet to his left; he shot inside it and pulled the doors closed, leaving a small crack to peer through. Seconds later, a bell clanged, and Malfoy stepped into the shop.

The other was inside Hogwarts as peeves smashes it

Filch was looking triumphant. “That vanishing cabinet was extremely valuable!” he was saying gleefully to Mrs. Norris. “We’ll have Peeves out this time, my sweet —”

H.P.C.S Chapter 8 page 28

Where they both in their respective places for years? Since Voldemort first gained power? Vanishing cabinets were very popular at that time. Was it there in case death eaters stormed the castle? So the staff or students could have a quick get away? But that doesn't make much sense, as that would take a long time to evacuate a large amount of people. Does anyone know when and why they were there in the first place?

Answer 1

Possibly for Contingencies

As you can see in book six, Vanishing Cabinets are extremely potent objects, as it rendered the Anti-Apparation wards of Hogwarts about as powerful as buttermilk. Therefore, the Headmaster of Hogwarts could have meant to use it in case of an unforeseen contingency during the First War. That means the other Cabinet should have been connected to a safehouse of the Order of the Phoenix or perhaps, even a public apparition point.

This is quite a stretch, but, if it was the latter, it follows that a Death Eater's son or daughter reported back info regarding the Cabinet. Thus, the Death Eaters found out, and sought to undo this escape route. But before that, Voldemort gets defeated by child Harry, and the Death Eaters run for their lives.

If it was the former, then Pettigrew could have found out about this and reported it back to the Death Eaters.

In both cases, the knowledge lay forgotten, until it was dug up when Voldemort comes back in Harry's fourth year. Either way, the Death Eaters somehow get their hands on the other Cabinet, bring it to B&B's and wreak their own brand of havoc.

This isn't canon, just reasoning and speculation.