So he had lifted it aboard.

So he had thought it was a great success.

So he had also thought he could drag it to the luggage compartment easily.

He had been correct in his assumptions except the easy part. This luggage weighed what, a ton? The little first year pulled and pulled and pulled, but it moved too slowly. His happiness of success evaporated too quickly to be replaced by anger, and by the time he'd made it to the luggage compartment, he was flushed deep scarlet and there wasn't one dry spot on his body. He tied his luggage to the closest place, and it took all his will not to collapse there. After panting for a few seconds, he dragged himself out to find somewhere to sit.