There are 2 titles associated with this firm.

@book{ wphp_9141
  author={Stevens,Grace Buchanan},
  year={1818},
  title={Llewellen, or, The Vale of Phlinlimmon: A Novel. In Three Volumes},
  publisher={Macredie, Skelly, and Co. \& Thomas and George Underwood \& },
  address={Edinburgh},    }
@book{ wphp_13346
  author={Chapone,Hester Mulso and Gregory,John and Pennington,Sarah},
  year={1821},
  title={Letters on the Improvement of the Mind. Addressed to a Lady. By Mrs. Chapone. A Father's Legacy to his Daughters. By Dr Gregory. A Mother's Advice to her Absent Daughters. By Lady Pennington. With Lives of the Authors.},
  publisher={Thomas Tegg [111 Cheapside] \& William Oliphant \& Waugh and Innes [1818-25] \& James Robertson [Parliament Square] \& William Whyte and Co. \& Fairbairn and Anderson \& Macredie, Skelly, and Co. \& John Bell and John Bradfute [6 Parliament Close] \& John Robertson \& Stirling & Slade},
  address={Edinburgh},    }