But the pace began to slow as , firstly , illness limited the composer 's ability to do much work .
These included reversing the order of key scenes and , in the case of the opening scene showing the foundation of Venice , totally inventing it .
The pace began to slow as , firstly , illness limited the composer 's ability to do much work .
These included reversing the order of key scenes and , in the case of the opening scene showing the foundation of Venice , totally inventing it .