The earliest portrayals of the "Sonderkommando" were generally unflattering. Miklos Nyiszli, in "Auschwitz: A Doctor’s Eyewitness Account", described the "Sonderkommando" as enjoying a virtual feast, complete with chandeliers and candlelight, as other prisoners died of starvation. Nyiszli, an admitted collaborator who assisted Josef Mengele in his medical experiments on Auschwitz prisoners, would appear to have been in a good position to observe the "Sonderkommando" in action, as he had an office in Krematorium II. But some of his inaccurate physical descriptions of the crematoria diminishes his credibility in this regard. Historian Gideon Greif characterized Nyiszli's writings as among the “myths and other wrong and defamatory accounts” of the "Sonderkommando", which flourished in the absence of first-hand testimony by surviving "Sonderkommando" members.