TEP
Go ahead and explain it. Tilly had time to write multiple columns in multiple publications at least monthly if not more frequently over period of several decades. For many years he wrote a weekly column, for more than one publication simultaneously. He wrote and published two books relating to golf. But Phil Young aka Phil-the-author tells us the reason he didn't write a book on golf architecture was because he had other interests, loved his grand children, liked the theater and travelled, and wasn't motivated to write a book on his life's work.
I'm pretty sure other golf architects of his stature who wrote books on design loved their families as much as he did, had multiple interests, and travelled extensively. Hell Mackenzie travelled around the world, travelled to S.America, commuted between the US and England, and had time to write two books!
Explain to me how Tilly had the time to write thousands of articles (often relating to golf architecture) and two books, but not enough time to write a book, or compile one, on golf architecture.
I'm sure there is a reason why he didn't write a book, but it wasn't because he wasn't motivated or didn't have time to write.