On Mon, 18 Feb 2002, Ashley Yakeley wrote:

Has anyone attempted any kind of Scheme interpreter in Haskell?

Yep. Some years ago a certain Abe Seika <abe@suntory.hallab.co.jp> posted to comp.lang.functional announcing that he had written a r4rs compliant Scheme interpreter in Haskell. I mailed him and asked for the code and got it. I don't know if the email address is still valid but I think you should give it a try. Best wishes, /Josef