Who played the role of Colonel Pickering in Pygmalion?

In the original 1913 stage play "Pygmalion" by George Bernard Shaw, the role of Colonel Pickering was played by actor Sir Herbert Beerbohm Tree. In the 1938 film adaptation, the character was portrayed by Wilfrid Lawson. The role is significant as Colonel Pickering serves as a kind and supportive figure to Professor Henry Higgins and Eliza Doolittle throughout the story.