Pencils have never contained the metal, lead, although the word commonly used to describe the centre core of a pencil is, in English, 'lead'. The ancient tool which preceded the modern pencil was a...
Lead has many uses and applications, and was even more commonly used in the past: Stained glass windows, especially in older churches, use lead to hold the glass pieces in place; some boats strap...
which glass contains lead in it?
Crystal glass has lead in it.
more about types of glass here: http://www.britglass.org.uk/AboutGlass/TypesofGlass.html