Rod Stewart provided significant support to his friend and mentor Long John Baldry during Baldry's final illness. As detailed in various sources, Stewart covered Baldry's medical expenses, ensuring that he received the necessary care. He also kept a bedside vigil, demonstrating the depth of their friendship and Stewart's commitment to being there for Baldry in his time of need. This support is a testament to the bond they shared and the respect Stewart had for Baldry's influence on his career. For more details, you can refer to articles such as LONG JOHN BALDRY SERIOUSLY ILL and Pioneering gay blues musician Long John Baldry dies.