Such at least seems to be the most probable account of this mysterious and doubtful matter.

It's not a mysterious matter that requires a degree from an art school and a penchant for neon-purple hair.

So to that even more mysterious matter, the making of an artist.

But what is the source of this mysterious dark matter?

I find the whole matter very mysterious, and under different circumstances I might reconsider my decision.

There were two theories, both of which have proved to be correct, as to the identity of this mysterious matter.

There was the more mysterious matter of the steamed halibut.

Bad women and all they involved were mysterious and revolting matters to her.

He could not forget that last interview and the mysterious matters which Kashiwagi had been unable to keep to himself.

Scientists have been seeking this mysterious dark matter for decades.