The Rev.Lee Massey was the clergyman of the Mount Vernon church, and the church at Alexandria had nothing to do with Mount Vernon.

There never was, moreover, such a person as the rector of Mount Vernon parish, but it was the Weems way of treating his appearance before the great man, and of deceiving the world with the notion of an intimacy which the title implied.
Weems, of course, had no difficulty with the public life, but in describing the boyhood he was thrown on his own resources, and out of them he evolved the cherry-tree, the refusal to fight or permit fighting among the boys at school, and the initials in the garden.
This last story is to the effect that Augustine Washington planted seeds in such a manner that when they sprouted they formed on the earth the initials of his son's name, and the boy being much delighted thereby, the father explained to him that it was the work of the Creator, and thus inculcated a profound belief in God.

This tale is taken bodily from Dr.Beattie's biographical sketch of his son, published in England in 1799, and may be dismissed at once.

As to the other two more familiar anecdotes there is not a scintilla of evidence that they had any foundation, and with them may be included the colt story, told by Mr.Custis, a simple variation of the cherry-tree theme, which is Washington's early love of truth.

Weems says that his stories were told him by a lady, and "a good old gentleman," who remembered the incidents, while Mr.Custis gives no authority for his minute account of a trivial event over a century old when he wrote.
To a writer who invented the rector of Mount Vernon, the further invention of a couple of Boswells would be a trifle.