This was a gruff way of speaking to a tired sick old Natural Philosopher, yet an improvement on the early days in the Tower, when Bob had been suspicious and chilly, or recent times when he'd been patronizing. When Bob had witnessed John Churchill shaking Daniel's hand on the Tower causeway a few hours earlier, he'd immediately begun addressing him as 'guv'nor.' But he'd persisted in his annoying habit of asking Daniel whether he was tired or sick until just a quarter of an hour ago, when Daniel had insisted that they shoot one of the flumes under London Bridge rather than take the time to walk around.