  The chemical compositions of the C-rich pAGB stars IRAS 05113+1347 and IRAS
22272+5424 are determined from high-resolution optical spectra using standard
LTE model atmosphere-based techniques. The stars are C, N, and $s$-process
enriched suggesting efficient operation of the third-dredge up in the AGB star
following a first dredge-up that increased the N abundance. Lithium is present
with an abundance requiring Li manufacture. With this pair, abundance analyses
are now available for 11 C-rich pAGBs. A common history is indicated and, in
particular, the $s$-abundances, especially the relative abundances of light to
heavy $s$-process elements, follow recent predictions for the third dredge-up
in AGB stars.
