Film editor who entered American film with William S. Hart's SELFISH YATES in 1918. Specializing in cutting westerns until the mid-1930s, some of his other notable credits, alone or in collaboration, include THE LAST OF THE MOHICANS (1936), PACIFIC LINER (1939), A BILL OF DIVORCEMENT and WAGON TRAIN (both 1940), MEXICAN SPITFIRE'S ELEPHANT (1942), MUSIC IN MANHATTAN (1944), THE BELLS OF ST. MARY'S and THE SPIRAL STAIRCASE (both 1945), THE FARMER'S DAUGHTER (1947), MR. BLANDINGS BUILDS HIS DREAM HOUSE (1948), HOLIDAY AFFAIR (1949), THE SECRET FURY (1950), TWO TICKETS TO BROADWAY (1951), PLUNDER OF THE SUN (1953), SUSAN SLEPT HERE (1954), RAGE AT DAWN (1955), BUNDLE OF JOY (1956), JET PILOT and THE GIRL MOST LIKELY (both 1957), THUNDER ROAD (1958), and VOICE OF THE HURRICANE (1964). In 1959, Marker edited some episodes for series television: "Behind Closed Doors", "Law of the Plainsman" and "Lassie".  Nominated for Film Editing 1945: THE BELLS OF ST. MARY'S 1 nomination