My guess is that Louise Garwood was a reader of Abbe Niles's "Ballads, Songs and Snatches" column in the Bookman.
Here is what she wrote on September 1, 1928:
Niles classifies jazz as "sweet" and "hot." He likes the "hot," which slightly modifies the original pandemonium of the old "Livery Stable Blues," more than the purring respectability of the "sweet," whose hush and muffled throb is heard behind a forest of potted palms at debutante dances.
Here is what appeared in the Democrat on February 10, 1929:
Mr. Beiderbecke classifies jazz as "sweet" and "hot." He likes the "hot," which slightly modifies the original pandemonium of the "Livery Stable Blues," more than the purring respectability of the "sweet," whose hush and muffled throb is heard behind a balustrade of potted palms at debutante dances.
Finally, here is what appeared in the Bookman (Vol. 67, April 1928, page 170):
There is better popular music today than in the Golden 'Nineties, the Elegant 'Eighties, and so on down, but its quantity is embarrassing. However -- Debut-dance fox-trots, recalling the hush and the deep muffled throb of the full Whiteman band behind a forest of potted palms . . .
For those keeping score at home, I think that Garwood, in researching Niles, plagiarized his writing, and then her plagiarism was plagiarized by the Democrat, on top of the paper's other and more extensive plagiarisms.