What we know
The grave Augustus Voorhees called 'O'Falley's Grave' in 1858, twelve miles along the trail from Marcy's camps; its headstone faced south below the Point of Rocks in 1979 (von Ahlefeldt pp. 20-21).
Where it was
'Fagan's Grave Camping Place': Scott, Historic Trail Map of the Denver 1x2 Quadrangle (USGS I-2639, 1999, S-0106), symbol read from the reprojected sheet good to a few hundred feet); beside Kiowa Creek just west of Scott's Point of Rocks. 'Along the Jimmy Camp Trail on the west bank of Kiowa Creek near the Point of Rocks' (von Ahlefeldt p. 20, photo p. 21); the 1987 Black Forest plan's Map 2 No. 25.
Read from Glenn R. Scott's USGS historic trail map of 1999 and confirmed by a second, independent source.
Sources
Sources are named in the text above. Numbers such as S-0080 refer to our source list. Most newspaper quotations were read in the Colorado Historic Newspapers Collection. Long quotations from recent books are shortened here.