He began working on it in 1873, having collected material since 1870.

By 2009, a total of €284,000,000 have been collected since 1990.

With a fund of over £775,000, 72 works by 45 significant international artists have been collected since 2003.

And there is nobody to collect this money since his death.

Specimens have been collected since the 1830s from local areas and around the world.

Data have been collected from the same families and their descendants since 1968.

This species has not been collected since its original description in 1896.

I have collected his work since the mid-80's and am pretty obsessive about it.

This is the institute's first new area of collecting since its founding in 1955.

Most folklore materials have been collected since the mid-19th century.