Minutes of the Board of Directors and stockholders, 1887-1968, are the official records of the proceedings of meetings. The majority of these are typed and in bound volumes. Also included in the minute books are typed copies of the Articles of Incorporation and by-laws. Other minute books include those of the Executive Committee of the Board of Directors, 1905-1927, and the Sullivan Mining Company, 1917-1955. Book two of the Sullivan Company had warped badly due to the thickness of the material glued to the pages; for this reason it was dismembered and the pages placed in folders.

Minutes for several internal committees are also included, the Management committee, 1955-1962; 1969-1972; Management-Operating committee, 1963-1969; and Policy and Development committee, 1956-1959. The Management committee was, until April 1955, called the Policy Committee. It contains reports on general operations by managers of the various divisions--Mine, Geology, Metallurgical, Plant services, Employee & Public Relations, and Financial. In February 1961 it became the Joint Management & Operating Committee, then in 1970 it split into two committees. The Planning and Development Committee was originally called Planning & Diversification.

Annual Reports, sometimes called Manager's reports or President's reports are yearly records of the activity of the firm. Annual reports from 1893-1907 are typed, while the remaining reports through 1978 are printed. In 1968 Gulf Resources and Chemical acquired Bunker Hill and the annual reports reflect all of that company's activities. The quarterly reports for Bunker Hill and Gulf are short descriptions of the income and expenses for each quarter.

Staff Reports to the Board of Directors, 1961-1968, are written reports prepared by the heads of the various divisions of the company and presented to the board at the semi-annual meetings. The 1961 report is dated August, and the years 1962-1965 contain a January and mid-year report presented in July or August. The 1966-1968 reports are dated January, and 1967 also has a bound volume of supplemental reports for April, July, and October.

The Printed notice of the annual meeting of stockholders in 1968 announces the proposed take over of Bunker Hill by Gulf Resources and Chemical Corporation.