An extract from the book entitled "History of Italians in SA 1489 - 1989"by Gabriel Sani, page 211.
Vincenzo Ciolli from Abruzzo, came to South Africa in 1923 with his father who had obtained a contract for the construction of a railway line in Natal. Vincenzo subsequently worked with Raffaele Monzali in the construction of the so called cylinder bridges. He was in the meantime allowed to exploit a stone quarry in Zululand; thus his first contract proved to be a profitable deal.
In June 1926, with his brother Antonio who had just arrived from Italy, he began railway construction works in Natal on a government contract. Soon after the Ciolli brothers obtained permission for the exploitation of a quarry in Harts Hill, in Natal, which provided the quantities of stone required for the job. After building a tunnel, not without technical difficulties in the Worcester district they undertook work on the Stanger-Tugela line. During the job Antonio Ciolli became ill with malaria, but managed to recover fully.
After a lull caused by the economic crisis in 1929, the Ciollis undertook the doubling of the Durban-Cato Ridge line. The next contract was for a bridge and a 1,5 mile tunnel; the detour of the old line that crossed the city of Durban. After completing yet another section of rail in Zululand, they went on to irrigation works, which led to the construction of the canal at Enqualeni (Natal). In 1932 the brothers carried out other irrigation works, with road detours in Zululand. They joined forces with Tomassi and Di Corpo and undertook the excavation of a tunnel at Delville Wood, completing it well within the set deadline.
They subsequently busied themselves with exploration of quarries in Alice (present Ciskei), in Newport and in Klipheuwel in the Cape. From the latter alone they extracted approximately 10 million tons of stone and crushed it to sizes required for various construction works.
Thereafter the Ciollis provided crushed stone for various filling works and for the construction and expansion of harbour facilities and dry-docks in Durban and elsewhere.