Letter, from Frederick W. Holland to Sir John Herschel, dated at Portsea Place Connaught Square Autograph letter signed by sender. R. I. Murchison has forwarded John Frederick William Herschel's letter about the noises at Nakkus in Sinai. Has heard the noises several times and thinks they are caused by the movement of sand. There is much static electricity in sand. 23 October 1868