At the same time , they expanded their operations to South Africa .
Cayzer Irvine built and managed ships for the association and Cayzer himself retained ownership of the original six Clan ships .
At the same time , Cayzer Irvine expanded Cayzer Irvine 's operations to South Africa .
Cayzer Irvine built and managed ships for the association and Cayzer himself retained ownership of the original six Clan ships .