Letter with envelope to Sir Charles Lyell from W. L. Carnegie asking for information and advice on geological matters. He requests that Lyell might tell him where to find publications of Lyell's work and which publication about Trap he should buy. He discusses his work at quarries near Newcastle and relates a story (with diagram) about contractors there. He also mentions that he has discovered a quarry with superior material and expects to be able to supply Arbroath with cheap, high quality paving blocks, 1841.