Sentence examples for had been unknown for from inspiring English sources

His whereabouts had been unknown for days.

It was a gift to her husband, the second world war airman and leading horticultural economist Roger Folley, and its whereabouts had been unknown for half a century.

A 'New' Caravaggio The Baroque galleries at the Metropolitan Museum of Art have a significant new addition: a Caravaggio whose whereabouts had been unknown for more than three centuries until the 1950's.

A systematic treatment of reciprocal (hodograph) transformations in integrable discretizations had been unknown for three decades.

They spotted the rock, whose whereabouts had been unknown for almost 90 years, earlier this month during a search for near-Earth objects.

This is because in contrast to plants and yeasts, for which strain breeding by crossing has been an essential strategy for strain improvement the majority of them were isolated in their asexual form and their sexual form and life cycle had been unknown for many years.

Ms. Laviano said Father Brett had disappeared, and his whereabouts have been unknown for years.

The compass is usually the position of the Sun or the Earth's magnetic field, but the map has been unknown for decades.

The mechanism of the methemoglobinemia caused by primaquine-based antimalarial drug has been unknown for decades.

As the molecular composition of calcium-release activated calcium (CRAC) channels has been unknown for two decades, elucidation of selective inhibitors has been considerably hampered.

However, the natural reservoirs of filoviruses have been unknown for many years, in spite of significant international efforts to determine their natural relationships.