We consider states of holographic conformal field theories constructed byadding sources for local operators in the Euclidean path integral, with the aimof investigating the extent to which arbitrary bulk coherent states can berepresented by such Euclidean path-integrals in the CFT. We construct theassociated dual Lorentzian spacetimes perturbatively in the sources. Extendingearlier work, we provide explicit formulae for the Lorentzian fields to firstorder in the sources for general scalar field and metric perturbations inarbitrary dimensions. We check the results by holographically computing theLorentzian one-point functions for the sourced operators and comparing with adirect CFT calculation. We present evidence that at the linearized level,arbitrary bulk initial data profiles can be generated by an appropriate choiceof Euclidean sources. However, in order to produce initial data that is verylocalized, the amplitude must be taken small at the same time otherwise therequired sources diverge, invalidating the perturbative approach.