Clarendon is on the main south railway line, thirty miles south-west from Dunedin, and four miles north of Waihola. It is a farming district, and the soil is extremely fertile. The Ewing Phosphate Works are situated within the district, and give employment to a number of men. There is a railway siding, which is used chiefly in connection with the transport of phosphate to Dunedin.

Ewing Phosphate Company, Limited , Clarendon and Millburn; Head Office, 14 Crawford Street, Dunedin, Otago. This industry was established on the 1st of June, 1902, and in the course of the past two years, the output has increased so rapidly that at present (1904) the business is spoken of as being one of the leading industries of the colony. It also has the distinction of being the first enterprise of its kind in Australasia, and is owned by a small syndicate of Dunedin gentlemen. Mr. Ralph Ewing discovered the present quarries in 1901. As long ago as 1893 he discovered phosphate at Whare Flat, but on account of the locality being in accesible by rail, no work has been done there up to the present—1904. The present deposits are situated on the hills in the Horseshoe Bush estate, and the phosphate rock is brought down to the burning ground, a distance of about a mile, in trollies running on a single track. It is then stacked in kilns, from 150 to 250 tons, classified into various grades, the highest grade bearing 70 to 80 per cent, of phosphate; and is then put through the process to make it marketable. The Company's output is about fifty tons per day; the produce is railed to Dunedin, and disposed of to firms engaged in the manufacture of manure. The Company at present works three deposits; and the rock, varying from 10 feet to 30 feet in depth, and resting on a green sand bed, occurs over an area of two miles. About twenty men are employed in quarrying, trucking, and kiln-building, and the whole industry is under the personal supervision of Mr. Ralph Ewing. In 1900 Mr. Ewing took a trip to the United States of America, and remained there for nearly a year, visiting the phosphate fields in Tennessee and other States, and acquiring a general knowledge of the industry which he has since used with considerable success. Mr. Ewing's father, Mr. W. A. Ewing, an old colonist and highly-respected resident of Dunedin, was also connected with the discovery and development of the Company's quarries.