  We have measured some simple matrix elements for pseudoscalar and vector
mesons made of Wilson valence quarks and staggered sea quarks at $\beta=5.6$ at
sea quark masses $am_q=0.01$ and 0.025. Our measurements include the decay
constants of pseudoscalars (including $f_D$), the wave function at the origin
(or decay constant) of vector mesons, and the calculation of quark masses from
current algebra. The effects of sea quarks on the simulations are small. We
make comparisons to quenched simulations at similar values of the lattice
spacing ($1/a \simeq 2$ GeV).
