Magazine  (Nov 1921)  Page(s) 159.  
 
"Mrs. Pleas on Raising Seedling Peonies"
...Kelway's single white, The Queen, was our only plant bearing seeds, blooming before any other kind was open; it was not hybridized, yet from this one planting I have every color and shade from White Swan to Black Beauty. [...]
From this one planting of single white seeds came Elwood Pleas, Midsummer Night's Dream, Gem, Mary, Quaker Lady, Shabona, Mad. Pleas, Walter Morgan, Golden Wedding, Nellie Pleas, Gypsy Queen, Laura E. Pleas, and Rosy Dawn in doubles; and in singles, White Swan, Wild Rose, Golden Cushion, Pocahantas; among the Japanese, Dr. Edgar Pleas, Novelty, Altar Candles, and Golden Nugget represent the best. [...]
—Sarah A. Pleas, Whittier, California

Magazine  (Jul 1921)  Page(s) 129.  
 
Mrs. Pleas' Estimate of Her Own Peonies
Japanese Varieties
Dr. Edgar Pleas — One of the sweetest and one of the longest in bloom; guards rosy, fading white; petaloids bright canary, fading white; on well-developed plants the yellow stamens are mounted with snow-white plumes, midway that are cupped and curved, and that are wider than the petaloids.  Other appropriate names suggested for this variety have been White Cap and Ostrich Plume.

Magazine  (Jan 1920)  Page(s) 11.  
 
Dr. Edgar Pleas is another even prettier little Jap, with fine clusters of bloom, light pink guards, center petaloids bright canary, fading white when at its best.  After the plant is strong the narrow yellow petaloids put on airs by developing a wide, curved plume of pure white, much wider than the yellow petaloids themselves, midway on the petaloids; resembling the plumes on the "Mums", hence its name.  I first called it Ostrich Plume.