Crows Basket

I was laying down waiting to fall asleep and thought of a fictional story in my head. I imagined a forgotten civilisation that existed 50,000 years ago. They treasured people that were born as dwarfs because they created a basket that tetheres with 50 domestic crows. They all pull on a string and carry the basket. They can't carry a full sized man but they can carry a man with dwarfism. They would update their maps and carry important messages to the different parts of the kingdom using these baskets with dwarves in them. The 50 crows have strings around their feet and work in tandem to lift the basket into the air. The dwarfs are also able to navigate the cave systems and draw more maps. 

In this scenario, powered flight didn't start with the right brothers, it started with this civilization. One of the dwarfs thought it would be a good idea to keep a fire in the basket and trap the hot air from the fire in a large cloth to give the basket extra lift so the crows would only need to tug the basket forward and not lift it, but a deadly strain of small pox rampaged through the kingdom and caused many people to die. All their technology and progress was abandoned in one month. It was as if they never existed.

Dreams dreams dreams.