At the age of 15, he became an assistant to the Official Assignee at the Bankruptcy Court in the City of London, where he learned the accounting business.

[1] At the age of 25, Deloitte opened his own office opposite the Bankruptcy Court in Basinghall Street.

[1] He discovered fraud perpetrated on the Great Northern Railway by Leopold Redpath,[2] invented a system for railway accounts that protected investors from mismanagement of funds, and was to become the grand old man of the profession.

[3] He served as president of the newly created Institute of Chartered Accountants between 1888 and 1889.

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