Well actually that photo of the loaded LORRIES of wool, are only 'around town clowns', look at how many horses are hitched to the front LORRY.
Just 4 horses for about 10 ton of wool, so it would NOT be going very far with those few horses, maybe it's being moved from one wool store to another wool store just down the road. With only 4 horses hitched, they would NEVER be able to pull that load up a slight incline, let alone bring it all the way into town from miles away out bush.
A LORRY has 4 SMALL wheels and they are ALL under the loaded platform, a WAGGON, note the double 'G' which is the correct way to spell a horse drawn Waggon, has 4 wheels as well, BUT, the top of the rear wheels are always above the loaded platform and the rear wheels are a wider track than the loaded platform as well.
A Waggon that is loaded with about, say 14 tons of wool, would require at least 16 horses to move the vehicle over long distances, a big draft horse can push about 1 ton, so 16 big draft horses are capable of pushing about 16 ton.
Pushing is the correct term/name for a draft animal to move a vehicle, they PUSH into the collar, which is attached to the’Traces’, which are normally attached to a Swingle Bar ( some times the Traces are attached directly to the vehicle, but not that often ), which in turn is attached to the vehicle. So if anybody says that a horse pulls the vehicle, ask them — do they attach the Horses Tail directly to the vehicle ?
For those that have a thirst for further knowledge ---------------