To help you find the information you're looking for, could you provide more context or details about this person? For example:
* Are you sure about the name and spelling? There might be a slight variation in the spelling.
* Do you have any other information about him? Like his approximate age, any notable achievements, or the time period he was active?
* Where did you hear this name? Was it from a book, article, or other source?
With more information, I might be able to help you find out if he was indeed a British showjumper.