Complex sentence: Factory workers were sent by their employers, country villagers were sent by their generous land-owners, Thomas Cook, the travel agent, arranged special excursions by train and invalids were included by reserving Saturday mornings for their participation.
Split into simpler sentences: Factory workers were sent by their employers, country villagers were sent by their generous land-owners, and Thomas Cook, the travel agent, arranged special excursions by train. Everyone was a participant in the new industrialized world, even invalids were included by reserving Saturday mornings for their participation.