Possible Clues:

• Carrying too much? Load never varied
• Again left a site carrying too much
• That's too much to have to bear
• Ale vendor finding it too much to bear?
• Having too much on, even a lord can go to pieces
• Load never shifted - too heavily weighed down
• Read novel that's complicated and too heavy
• Under too great a load
• Once again, left Yemeni port with too much on board
• Ravel done badly - too heavy?