Abel Isaacstein

In the novel At Bertram's Hotel, Abel Isaacstein is named as one of the directors who have ultimate control over the hotel. This fact was not widely known nor easily discovered as the hotel was owned by several layers of holding companies. Mr Robinson discovered that the hotel's ultimate owners were the brothers Robert Hoffman and Wilhelm Hoffman. When Robert was interviewed by Chief Inspector Davy, he revealed the composition of the hotel's board of directors to him. Whether Isaacstein himself was aware or complicit in the criminal activities in the hotel was not revealed in the book.