The Secret of the Underground Room (annotations)
A
- Admiral Hood Inn (Ilfracombe, Devon, England)
- Antimony (Sb) (element)
- Apostle spoon
- Arthur, King
- Atlantic Ocean
- Avon River
B
- Bahamas
- Balkan Sobranie (tobacco)
- Barchester Towers (book)
- Bath, Somerset, England
- Bentley (automobile)
- Boston Red Sox (baseball team)
- Boston, Massachusetts
- Brandy
- Bristol Channel
- Bristol Police Department (Bristol, England)
- Bristol Post (newspaper) (Bristol, England)
- Bristol Public Library (Bristol, England)
- Bristol Temple Meads railway station (Bristol, England)
- Bristol, England
- Britannia metal
- Broad Street (Bristol, England)
- Brunel, Isambard Kingdom
- Bustard (bird)
C
- Cabot Tower (Bristol, England)
- Charles I, King (England)
- Cheshire (cheese)
- Chess (game)
- Childermass, Humphrey Clinker
- Childermass, Roderick Random
- Christmas Steps (Bristol, England)
- Church of Faceless Images
- Church of St. John the Baptist (Glastonbury, Somerset, England)
- Church of St. Mary Redcliffe (Bristol, England)
- Clifton Suspension Bridge (Bristol, England)
- Coca-Cola (beverage)
- Coleman Lamp
- Colman's Mustard
- Coote, Charles
- Copper (Cu) (element)
- Cross Keys Hotel (Glastonbury, Somerset, England)
- Crucifix
D
- De Marisco family
- Detroit Tigers (baseball team)
- Dimension X (radio program)
- Dixon, Harrison
- Dixon, Henry (Grampa)
- Dixon, Johnny (John Michael)
- Dixon, Kate (Gramma)
- Drake (bird)
- Duke of Clarence (ferryboat)
- Durham, New Hampshire
- Duston Heights Golf Course (Duston Heights, Massachusetts)
- Duston Heights, Massachusetts
E
- Extra-sensory perception (ESP)
F
- Fairbanks, Douglas
- Fanshawe's Pier (Ilfracombe, Devon, England)
- Ferguson, Byron Q. "Fergie"
- Fillmore Street (Duston Heights, Massachusetts)
- Floating Harbour (Bristol, England)
G
- Ghost, girl
- Glass plate, green
- Glastonbury Abbey (Glastonbury, Somerset, England)
- Glastonbury Bus Station (Glastonbury, Somerset, England)
- Glastonbury Tor (Glastonbury, Somerset, England)
- Glastonbury, Somerset, England
- Grand Hotel (Bristol, England)
- Greedy, George
- Green Line bus
- Green Line Terminal (Bristol, England)
H
- Haggstrum College (Duston Heights, Massachusetts)
- Hardy Boys (fictional characters)
- Harman, Martin Coles
- Harvey’s Restaurant (Bristol, England)
- Higgins, Mary Elizabeth
- Higgins, Thomas
- History of England (book)
- Holy Angels Catholic Church (Rocks Village, Massachusetts)
- Holy Water
- Horseshoes (game)
I
- Ilfracombe, Devon, England
J
- Jesus
- Julius Caesar (play)
L
- Labarum (illustration)
- Logan Stone (Lundy Island, England)
- London, England
- Lundy Island, England
M
- Marisco Castle (Lundy Island, England)
- Mars (planet)
- Mastermann, Rufus (Reverend)
- Mastermann’s Bottle Shop (Ilfracombe, Devon, England)
- Merrimack River
- Michael's Church, Saint (Duston Heights, Massachusetts)
- Michael's Tower, Saint (Glastonbury, Somerset, England)
- Missal (book)
- Monohan, Bishop
N
- National Geographic (magazine)
- Newcastle Brown Ale (alcohol)
O
- O'Trigger Boarding House (Bristol, England)
- O'Trigger, Lucius
P
- Paddington station (London, England)
- Palmer Method handwriting
- Philippines
- Pinball machine
- Pontiac (automobile)
- Pool (Billiards) (game)
- Prince of the Air
- Puffin (bird)
R
- Rocks Village Bridge (Rocks Village, Massachusetts)
- Rocks Village, Massachusetts
- Roman Baths (Bath, Somerset, England)
- Royal Britannia Hotel (Ilfracombe, Devon, England)
- Royal George Hotel (Glastonbury, Somerset, England)
S
- Sally, Aunt
- Saturn (planet)
- Sea Hawk, The (fim)
- Shakespeare, William
- Sherry (alcohol)
- St. Margaret's Hospital (Massachusetts)
- St. Paul's Road (Bristol, England)
- Stilton (cheese)
T
- The Little Man Who Wasn't There (poem)
- Thomas, Saint
- Three Fishers, The (song)
- Times of London (newspaper)
- Tin (Sn) (element)
- True Cross
U
- Underground Room (Marisco Castle, Lundy Island, England)
- University of New Hampshire (Durham, New Hampshire)
- Utah
V
W
- Wales
- Wells Cathedral (Wells, Somerset, England)
- Wells, Somerset, England
- Williams, Ted
- World War II
Y