Blackman. The Morgan Horse Magazine, circa late 1940s

Upper photo from TMH

Lower photo from the AllBreed site

https://beta.allbreedpedigree.com/blackman-aYr1GrGm/pedigree

His sire, Rodman,   was bred by Wm. Hearst, San Simeon, CA. Redman, was 3/4 Richard Sellman horses and 1/4 Brunk. The dam of Redman was bred by Roland Hill (using a Sellman mare to the Brunk stallion.). 

Blackman's dam was bred by J C Brunk. 

Blackman had a great pedigree and he was bred by that excellent breeder, E W Roberts. 

From the AllBreed site--

Color: blk Height: 14.3 AMHA #8622 Black, lh ankle white, 14.3, 1000 lbs. Foaled 6/23/1942, HiPass, CA. Bred by EW Roberts. Died October 4, 1965. Progeny: 69 colts, 60 fillies.

Ever so many of his get were used in breeding and competitions. Take a look at his progeny listing at the above link and you will see many names of familiarity.