  In a sample of thirty normal elliptical galaxies observed with the Spitzer
IRS, one galaxy, NGC4697, shows strong PAH emission, but with an apparently
weak 7.7 micron feature. We find that the PAH emission is confined to the
central regions of the galaxy and that once a quiescent elliptical galaxy
spectrum is subtracted, the PAH feature ratios are normal. We show that the PAH
spectrum resembles the diffuse ISM of our galaxy rather than an HII region, and
is not indicative of a starburst galaxy. We suggest that the PAHs in NGC4697
are consistent with a recent but now past burst of star formation.
