Columbia subject headings:
Grubb, Howard, Sir, 1844-1931.
Grubb, Thomas, 1800-1878.
Telescope makers--Biography.
Telescopes--History.
Harvard subject headings:
Grubb, Howard, Sir, 1844-1931.
Grubb, Thomas, 1800-1878.
Telescope makers--England--Biography.
Telescope makers--Ireland--Biography.
Telescopes--Design and construction--History--19th century.
Telescopes--History.
Princeton subject headings:
Grubb, Howard, Sir, 1844-1931.
Grubb, Thomas, 1800-1878.
Telescope makers--England--Biography.
Telescopes--Design and construction--History--19th century.