Shortly before H. W. Fowler’s renowned Dictionary of Modern English Usage appeared, almost a century ago, excerpts from it were published in the tracts of the Society for Pure English (Fowler was a member) and subject to critical commentary. One entry proved especially contentious, sparking a lively exchange with linguist Otto Jespersen.
These two grammatical heavyweights disagreed over what Fowler called the fused participle (aka possessive with gerund, or genitive before a gerund): a phrase like it led to us deciding, instead of the possessive form that Fowler would insist on: it led to our deciding.
When Fowler scorned the construction as ‘grammatically indefensible’, Jespersen (also in the tracts) defended it on historical principles and called Fowler’s piece ‘a typical specimen of the method of what I call the instinctive grammatical moralizer’.
Fowler’s reaction is described in The Warden of English, Jenny McMorris’s enjoyable and solidly researched account of the lexicographer’s life and work: