Walter Ryerson Johnson (October 19, 1901 – May 24, 1995) was a 20th-century American pulp fiction writer and editor.
His first known published work was a short story in the February 1923 issue of Detective Tales.
A number of the Star Western stories featured hero Len Siringo.
He wrote horror stories for Dime Mystery Magazine, Detective Tales and other pulps.
These novels include Naked in the Streets (Red Seal, 1952), Lady in Dread (Gold Medal, 1955); under the joint pseudonym Matthew Blood (together with Davis Dresser) The Avenger (Gold Medal, 1952), Death Is a Lovely Dame (Gold Medal, 1954); under Dresser's pseudonym Brett Halliday Dolls Are Deadly (Torquil/Dodd, 1960), Killers from the Keys (Torquil/Dodd, 1961) and more under the house name Robert Wallace.