"Peter Ilyich Tchaikovsky composed "The Seasons" at the request of the editor N.M. Bernard, who had commissioned him to write 12 short piano pieces portraying subjects and activities typical of the 12 months of the year. These were to be published, one per month throughout the year 1876, in the St. Petersburg music magazine Nuvellist. According to Nikolay Kashkin's memoirs, Tchaikovsky found the task simple and insignificant, and instructed his servants to remind him each month of the approaching deadline - whereupon he promptly produced the next installment in the series. Tchaikovsky no doubt welcomed this commission, which supplemented his salary as Professor of Harmony at the Moscow Conservatory and the income he derived from his compositions and his activities as music Critic for Russky Vedemosti.
Tchaikovsky joked to a friend about having to write such pieces ( " I continue to bake musical pancakes. Today the tenth has been tossed" )"
I feel purism opinions in this case are blown out of proportions. Ironically 10th number in the book happened to be ''October". Perhaps if not for deadlines, his other teaching and critiquing responsibilities, his bills, better editing job, C would be in the right hand. We'll never know... I personally think C in the right hand makes much more sense. CB line is another voice, third color. This argument is pointless. He wrote it for armatures! "Godowsky", "artistic value of the passage", "severely hampered", "comfort of arrangement". Uh, typical snobbery. Left hand camp - can't stand it.