Thomas Cook - Thomas Cook and Son

With John A Mason Cook, he formed a partnership and renamed the travel agency as Thomas Cook and Son. They acquired business premises on Fleet Street, London. By this time, Cook had stopped personal tours and became an agent for foreign or domestic travel. The office also contained a shop which sold essential travel accessories including guide books, luggage, telescopes and footwear. Thomas saw his venture as both religious and social service; his son provided the commercial expertise that allowed the company to expand. In accordance with his beliefs, he and his wife also ran a small temperance hotel above the office. Their business model was refined by the introduction of the 'hotel coupon' in 1866. Detachable coupons in a counterfoil book were issued to the traveller. These were valid for either a restaurant meal or an overnight hotel stay provided they were on Cook's list.

Conflicts of interest between father and son were resolved when the son persuaded his father, Thomas Cook, to retire in 1879. He moved back to Leicestershire and lived quietly until his death. The firm's growth was consolidated by John Mason Cook and his two sons, especially by its involvement with military transport and postal services for Britain and Egypt during the 1880s when Cook began organising tours to the Middle East.

By 1888, the company had established offices around the world, including three in Australia and one in Auckland, New Zealand, and in 1890, the company sold over 3.25 million tickets. John Mason Cook promoted, and even led, excursions to, for example, the Middle East where he was described as "the second-greatest man in Egypt". However, while arranging for the German Emperor Wilhelm II to visit Palestine in 1898, he contracted dysentery and died the following year.