FEARING the possibility of a new location and harmful building material content, when re-housing the York City Archives, David Gibson writes claiming to have checked with two building firms about the unproven properties of "hydro absorbic material".

A negative response gives cause for alarm (Evening Press, April 25 'Give us the answers') Fear not David, there are two major forms of this material, one natural, the other synthetic.

Both are available at your local pharmacy - or situated in your bathroom between the bath-end and the soap-rack.

The natural version is called a loofah, the other... a synthetic sponge.

Dale Minks,

Ancress Walk, York.

Updated: 10:35 Tuesday, April 30, 2002