 Koerner's exposure to Howard Pyle was significant, but his student colleagues also had much to offer and he shared techniques and styles with the likes of N. C. Wyeth, Harvey Dunn, Frank Schoonover and Stanley Arthurs.While still a Pyle student, he rented a studio adjacent to Anton Otto Fischer and William Foster and the interaction between these talented students proved mutually invaluable.Howard Pyle died in 1911, and Koerner published a tribute in the "New Amstel Magazine".