Since this week (August 2) marked the 105th birthday of one of Clark’s costars, friends and an all-around classy lady, Miss Myrna Loy, here’s some gossip about her. From February 1937: With Joan Crawford set for the lead in “Parnell” opposite Clark Gable, she was suddenly switched to “The Last of Mrs. Cheyney” which Myrna Loy was to do, and Miss Loy was given the Crawford part in “Parnell”. There are those who say Joan preferred the “Last of Mrs. Cheyney” role, and there are those who say director John Stahl preferred not having La Crawford in “Parnell.” First day on the “Last of Mrs. Cheyney” set, before she switched…