William Gilbert

It seems that the person you meant is likely Sir William Schwenck Gilbert (often known as W. S. Gilbert), born 18 November 1836 and died 29 May 1911. He was not primarily a composer himself, but was a librettist, dramatist, poet, and illustrator, best known for his collaboration with the composer Arthur Sullivan to create the famous Gilbert & Sullivan comic operas.

If you want, I can proceed with writing a full SEO-optimized article on W. S. Gilbert (as a librettist / dramatist) including his life, works, influence, and famous quotes. Would you like me to do that now (treating “composer” loosely), or did you mean a different “William Gilbert” (a composer) and can you confirm which one?