Natural as an adverb
In his entry on ‘try and do’, Fowler calls it “an idiom that should not be discountenanced, but used when it comes natural”.
What interested me was his use of ‘natural’ as an adverb. Oxford Online gives the example ‘keep walking—just act natural’, which sounds OK to me, if idiomatic.
There are examples from Dickens and Walter Scott of ‘comes natural’ in dialogues, where ‘natural’ is being used as an adverb, but Fowler’s use here sounds strange to me. Any thoughts?