Recall, several days ago we first posted details of the open letter from theGISinstitute to BP (we elected to link to the full letter rather than re-post in entirety) , however, the letter has since been removed from the website by Stephens. I just heard from Drew and he offers up some explanation as have been explained online at The Seminal
The circumstances appear to be that the letter was posted, and then at some point removed, but it appears to be now available at a different site, with an explanation of what has been done. A statement concerning the recovery and reposting of the letter in question is available at the post by Patrick Lockerby at scientificblogging.com. The full text of what appears to be the original letter and the previously mentioned statement by Patrick Lockerby are here.
The statement that is now posted where the original was once apparently posted is here.