Dog House on modern N&W steam

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Question:   How were the dog houses on tender for head brakeman heated?
Question:  What instructions were issued about standing while  
locomotive was in motion?
Question:  Was access to cab permitted by climbing over the coal pile?
Question: Where can i go for anecdotes about riding in this location  
and in cramped space?
Question:  Did the brakeman ever take water for the fireman on the road?