In his intro he shouldn't omit a brief history of transport before railways, roads and canals as for many hundreds of years everything was done by packhorses, which bequeathed us a fantastic network of bridleways for riding on. Sadly, backsliding local governments in the 60s managed to get 90% of these downgraded to footpath status so as to avoid the cost of maintenance. In 1946 and 1947 100,000 packhorses were slaughtered in the UK as ex-WW11 military lorries took away all their business.