The Doctor's Demise
After Joshua turned sixty, he began slowing down. He was healthy for his age, for sure, but he couldn't quite keep up with his companion. The irony didn't escape him. But Rose was content to slow down. They no longer jumped into the middle of chaos. Rose carefully steered them towards relaxing spots. Vacations and leisure.
By the time he was seventy, he couldn't make the jumps any more. His body reacted violently to the shift between traveling the Vortex and their landings. So they stayed home. Rose would occasionally make jumps without him. When she would return, she would regal him with tales of her travels. Usually, she would let him walk through her memories and experience them almost as if he were there.
Joshua's body began failing as he turned eighty. He was tired all of the time and his vision was failing. His body was finally betraying him.
Tony and his family would come around often and the house would once again be filled with laughter. Joshua loved seeing Tony's grandchildren.
Rose stayed by his side for the last of Joshua's life, never leaving. She stopped going on adventures, content to stay by her husband's side.
The last year of his life was the most difficult. His body had completely failed him. He was hooked to machines and his mind had deteriorated. Often, he would look at Rose and not see her at all. Other times, he would know who she was, but not the intimacy they had shared. When he became like this, it reminded Rose of her first Doctor.
Eventually, it seemed his mind had failed completely. He slept for hours and barely acknowledged anyone when he was awake.
One morning, Rose was woken by his frantic screaming through their telepathic connections. She flew to his side immediately, and grasped his hand. His last words filtered through her mind.
"Get back to him, Rose. Find a way. He still...we will always love you. Remember that."
With a last, agonizing breath, Joshua Noble was no more. As her mate perished, the Wolf howled and the Universe mourned with her.