Mark:
The list below contains courses in the U.S. from 1920 for which I have an attribution. I left out probably a hundred or so courses that remain as unknowns, and a few that have disputed dates. If you need any further information on any of the courses, let me know.
Sven
Hot Springs G&CC (Majestic) (Hot Springs, AR) - W. Park Jr.
Cyrstal Springs GC (San Mateo, CA) - H. Fowler
Flintridge CC (Pasadena, CA) - W. Watson
Hacienda CC (Los Angeles, CA) - W. Watson
Hillcrest CC (Los Angeles, CA) - W. Watson/W. Bell
Mira Vista G&CC (Oakland, CA) - W. Watson/R. Hunter
Pasadena GC (Pasadena, CA) - M. Behr/G. O'Neil
Rancho Park GC (Los Angeles, CA) - W. Bell
San Diego CC (San Diego, CA) - W. Watson/W. Bell
New Haven CC (New Haven, CT) - W. Park Jr. - redesign of existing course on same site.
Babson Park Golf & Yacht Club (Babson Park, FL) - S. Raynor
Kenilworth Lodge (Sebring, FL) - W. Stiles
Gainesville Municipal GC (Gainesville, FL) - D. Ross
Abingdon CC (Abingdon, IL) - T. Bendelow
Bloomingdale GC (Bloomingdale, IL) - T. Bendelow
Ingersol Park Municipal GC (Rockford, IL) - T. Bendelow
Longwood GC (Crete, IL) - T. Bendelow
Culver Military Academy GC (Culver, IN) - W. Langford
Tippecanoe CC (Monticello, IN) - J. Roseman
Ellinwood CC (Athol, MA) - D. Ross/W. Hatch
Ludlow CC (Ludlow, MA) - D. Ross
North Andover CC (North Andover, MA) - D. Ross
Sweetheart Tea Room (Shelburne Falls, MA) - D. Ross
Wahconah CC (Dalton, MA) - W. Stiles
Whaling City CC (New Bedford, MA) - D. Ross
Rolling Road GC (Baltimore, MD) - W. Park Jr.
Sherwood Forest GC (Annapolis, MD) - H. Strong
Paradise Springs GC (Paradise Springs, ME) - D. Ross
Fred Wardell CC (Detroit, MI) - D. Ross
Ludington Hills GC (Ludington, MI) - T. Bendelow
Pontiac CC (Pontiac, MI) - E. Way
Ruttger's Bay Lake GC (Dearwood, MN) - J. Dalgleish
Devils Lake Town and Country Club (Devils Lake, ND) - W. Langford/T. Moreau
Homestead CC (Spring Lake, NJ) - D. Ross
Montclair GC (Montclair, NJ) - D. Ross
Ausable Valley GC (Ausable, NY) - S. Dunn
Cazenovia Park Municipal GC (Buffalo, NY) - S. Dunn
Corning CC (Corning, NY) - T. Winton
Hamilton College GC (Clinton, NY) - Unknown
Hempstead G&CC (Hempstead, NY) - P. Lees
Hillcrest GC (Jamaica, NY) - D. Emmet
CC of Ithaca (Ithaca, NY) - A. Tillinghast
Paramount CC (New City, NY) - A. Tillinghast
Rye GC (Rye, NY) - D. Emmet
The Definance GC (Defiance, OH) - T. Bendelow
East Liverpool CC (East Liverpool, OH) - T. Bendelow
Lorain CC (Lorain, OH) - T. Bendelow
Piqua CC (Piqua, OH) - D. Ross
Westbrook CC (Mansfield, OH) - D. Ross
Twin Hills G&CC (Oklahoma City, OK) - P. Maxwell
Chester Valley CC (Brookline, PA) - A. Findlay
Lebanon CC (Lebanon, PA) - A. Findlay
Longue Vue Club (Verona, PA) - R. White
Nemacolin CC (Beallsville, PA) - E. Loeffler
Philipsburg CC (Philipsburg, PA) - A. Findlay
Pocono Manor Association (Pocono Manor, PA) - W. Flynn
Shamokin Valley CC (Shamokin, PA) - A. Findlay
St. Marys CC (St. Marys, PA) - D. Emmet
Beulah Lake GC (Mukwonago, WI) - T. Bendelow
Grant Park Municipal GC (Milwaukee, WI) - G. Hansen
Nakoma CC (Madison, WI) - T. Bendelow
Old Hickory GC (Beaver Dam, WI) - T. Bendelow
Oskaloosa GC (Oskaloosa, WI) - T. Bendelow
Tripoli CC (Milwaukee, WI) - T. Bendelow