The lists give the names of the officers of arms in ordinary since 1900 and their successors using the numbering system established by H.S. London, Esq., Norfolk Herald of Arms Extraordinary 7.
Each entry gives a link to the notice of appointment in The London Gazette (where known and available) and a chain of offices giving earlier and subsequent appointments.
Where other Gazette notices about the subject are known, these are shown beneath his entry in the file concerning his senior appointment e.g. to see a link to A.T. Butler, Esq., Portcullis Pursuivant being appointed Genealogist to the Most Honorable Order of the Bath, look beneath his entry as Windsor herald.