Byron quote translation?

[celticdragonfly]

Karl was reading a book I gave him, from the library, about the Regency period. It gives a famous quote from Byron about Glenarvon, what he replied when someone asked him what he thought of his portrait in the book:

Elle aurait été plus ressemblante si j'avais voulu donner plus de séances.

They don't give the translation. Mechanical translation only gives It would have been more resembling if I had wanted to give more meetings. I keep thinking I've heard this quote properly translated somewhere, but I can't find it. Anyone?