  In order to study the fate of mesons in thermal QCD at finite baryon chemical
potential, we consider light mesonic correlation functions using the Taylor
expansion to ${\cal O}((\mu/T)^2)$, in both the hadronic and quark-gluon plasma
phases. We use the FASTSUM anisotropic fixed-scale lattices with $N_f = 2+1$
flavours of Wilson fermion. We find that mesonic correlators are sensitive to
finite-density corrections and that the second-order terms indicate the chiral
crossover in the vector and axial-vector channels.
