Possibilities if the tree falls in the Land of Bob:
Yes, of course...Treebeard...BAARRAARROOOMMM...take a note, Merry and Pippin!
Yes, but if it fell on the writer the tree would have barked his shins no doubt, increasing the likelihood he'd use a twig and his own blood for the writing.
This close to Midsummer's Eve, some Druid most likely!
Yes, Lord Robert Murray of Crestfallen, Scotland, while searching for his wizard and his true love!
And the off chance that the White Rabbit would be there, assuming Gracie Slick was singing him to sleep; which probably made him late in the first place!