Here is Butterick Pattern # 3850 UNCUT Misses Nightshirt and Pajamas (Top and Pants) in sizes (extra small) XS, Small and Medium. Very loose-fitting, pullover nightshirt, above mid-knee or full length, has slightly extended shoulders, side slits, shaped hemline and above elbow flutter sleeves or long sleeves. Views A, B: purchased trim. View C: narrow hem. Tapered pants have elastic waist.
The pattern and instructions are still factory folded. The envelope shows just a little wear and creases from storage.