Here are a few possibilities:
* You might be thinking of a specific travel company: There are several travel companies with names similar to "Dean and Dawson". It's possible you're referring to one of them, but more information is needed to identify it.
* You might be thinking of individuals: It's possible there are individuals named Dean and Dawson who contributed to the growth of tourism, but again, more context is needed.
* You might be thinking of a specific event or development: There could be a historical event or development related to tourism involving individuals or groups with similar names.
To get a better answer, please provide more information about:
* What do you know about "Dean and Dawson"?
* What kind of contributions to tourism are you interested in? (e.g., travel agency, transportation, marketing, accommodation, etc.)
* Is there a specific time period or location you are interested in?
With more context, I can help you find the information you're looking for.