In The Reticence of Lady Anne, Saki writes:
Don Tarquinio lay astretch on the Persian rug, basking in the firelight with superb indifference to the possible ill-humour of Lady Anne. His pedigree was as flawlessly Persian as the rug, and his ruff was coming into the glory of its second winter.
The ruff of Don Tarquinio, A Cat , is said to be "coming into the glory of its second winter". What is Don Tarquinio's ruff? Is it implied to be apart of their body, or is it, as Lexico defines it, "a projecting starched frill worn round the neck, characteristic of Elizabethan and Jacobean costume."