While serving as bandleader with the USO during World War II, he met Marion Grant Tyler, the widow of the violinist Willy Tyler. Blake and Tyler married in 1945. She was a performer and a businesswoman and became his valued business manager until her death in 1982. In 1946, Blake retired from performing and enrolled in New York University, where he studied the Schillinger System of music composition, graduating in two and a half years. He spent the next two decades using the Schillinger System to transcribe songs that he had memorized but had never written down.