Who Invented The Sandwich?

The sandwich was born because... 

As quoted on the History.com website:  

The sandwich as we know it was popularized in England in 1762 by John Montagu, the 4th Earl of Sandwich. Legend has it, and most food historians agree, that Montagu had a substantial gambling problem that led him to spend hours on end at the card table. During a particularly long binge, he asked the house cook to bring him something he could eat without getting up from his seat, and the sandwich was born. Montagu enjoyed his meat and bread so much that he ate it constantly, and as the concoction grew popular in London society circles it also took on the Earl’s name.^{1 & 2}   

So, who is John Montagu, 4th Earl of Sandwich?

John Montagu, 4th Earl of Sandwich, PC, FRS (13 November 1718 – 30 April 1792 was a British statesman who succeeded his grandfather Edward Montagu, 3rd Earl of Sandwich as the Earl of Sandwich in 1729, at the age of ten. During his life, he held various military and political offices, including Postmaster General, First Lord of the Admiralty, and Secretary of State for the Northern Department.³  

(This is a work in progress...)

References
1.  History.com - https://www.history.com/news/the-story-of-the-sandwich
2.  Wikipedia - https://en.wikipedia.org/wiki/Sandwich
3.  Wikipedia - https://en.wikipedia.org/wiki/John_Montagu,_4th_Earl_of_Sandwich