Hi Matthew,

Thank you for contacting Mearto with your appraisal inquiry.
This is a bit of a tricky appraisal because I can find no other examples of her works identified as being done while under the influence of demerol; her watercolor and ink images range in value from $8,000 to $100,000 and I would expect these to fetch at least in the middle of that range if these can be authenticated as being by her. Conditionally appraised at $40,000-60,000 each.
If you are interested in selling these, we can recommend auction houses who can help authenticate and sell these on your behalf.
Based on the photos and information provided, and subject to examination, this is:

Frida Kahlo (American and Mexican, 1907-1954)
"Mi Radiographica," 1951
suite of four works
pen, ink and watercolor on 8 1/2 by 10 inch parchment paper
CONDITION: both appear to be in good condition
PROVENANCE: acquired from a gallery/dealer
$40,000-60,000 each or $160,000-240,000 for the group*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.