List what you think are the four most important items James Heron carried on his back whenhe hiked off to the diggings. Explain your choices.

The four important items that James Heron must carried on his back when hiking off to the diggings includes Oxygen bag, Foods, Water and Spare tyres.

What is the act of hiking off to the diggings?

The activities might be recreational or professional, but its involves riding a bike to a place of of excavating in the ground, most especially one of ore mining, metals, precious stones, gold mining etc.

In conclusion, the items that includes Oxygen bag, Foods, Water and Spare tyres must be carried along because its replenishes the body during the course of diggings hiking.