Academics Maria Pramaggiore and Tom Wallis remarked that Sellers fits the mould of a technical actor because he displays a mastery of physical characterisation, such as accent or physical trait. Writer and playwright John Mortimer saw the process for himself when Sellers was about to undertake filming on Mortimer's "The Dock Brief" and could not decide how to play the character of the barrister. By chance he ordered cockles for lunch and the smell brought back a memory of the seaside town of Morecambe: this gave him "the idea of a faded North Country accent and the suggestion of a scrappy moustache". So important was the voice as the starting point for character development, that Sellers would walk around London with a reel-to-reel tape recorder, recording voices to study at home.