To Have and Have Not (film) 1944. Bogart and Hawks served as their own technical advisers, because of their experience with fishing and sailing. After filming began, a romance developed between Bogart and Bacall, despite Hawks's disapproval. Bogart was married and at 45 years old, he was more than twice Bacall's age. They kept their relationship a secret from Hawks. This romance eventually led to Bogart divorcing Mayo Methot, his third wife. He and Bacall married a year after "To Have and Have Not" and remained married until Bogart's death in 1957. Hawks expanded Bacall's part to take advantage of the Bogart-Bacall chemistry. According to the
Sleep and memory a post-training REM sleep period to examine changes in P waves affecting reprocessing of recently acquired stimuli. It was found that not only were the P waves increased during post-training sleep but also the density of the waves. These findings may imply that P waves during REM sleep may help to activate critical forebrain and cortical structures dealing with memory consolidation. In a Hennevin et al. study, 1989, the mesencephalic reticular formation (MRF) was given light electrical stimulation, during REM sleep, which is known to have an advantageous effect for learning when applied after training. The rats in the experiment