In the 15 or 20 years since the two men began selling them, fresh dates have remained obscure.

But though the resonances ring, the source of the connection has remained obscure.

The whole of that relationship persisted in remaining obscure.

Count the playwrights who have used that device in their attempts to reach the universal, while remaining obscure.

Though Riddell went on to achieve fame, this, her first effort, written in 1883 when she was 51, has remained obscure.

Soon he retired from music, and in 1945, he sold his guitar, remaining obscure for the next twenty years.

I find myself in a position to throw light on just that part of his tragic career which has remained most obscure.

The novel was published in 1957 and remained obscure.

This article, however, had remained obscure in the intervening years, even amongst consumers of conspiracy theories.

But what he was pleading for remained obscure.