Robert Crumb's "Aline's 50th Birthday, August 1st, 1998" is an intimate pen and ink drawing created on the verso of a restaurant place mat, a characteristically unconventional support that reflects Crumb's playful approach to materials and surfaces. The work celebrates his wife Aline through Crumb's distinctive fine line technique, employing black ink and white-out corrections to render the subject with the meticulous detail and expressive linework that defines his draftsmanship. Executed on a discarded commercial object, the drawing exemplifies Crumb's ability to elevate everyday materials into meaningful artworks while documenting personal moments with both affection and artistic rigor.