In the end, no matter how much Clyde thinks he can only think of a single way and that is by killing all the three assassins with him inside the carriage
That is the only way for him to leave a trail without being caught. There is no other way. Even if there were carriages in the front and back, as long as Clyde deals with the ones with him, it would not be hard to be subtle and leave a trail
Fortunately, he can use blood. He can just have some blood slowly slid down from the gap in the carriage's door and unless the assassins were purposely looking, they would not notice the blood dripping down
However, the question now is how can Clyde possibly kill all three assassins? With how desperate he is, Clyde does not think that his morals would stop him from killing people