  We study a regularized version of Van Hove's 1952 model, in which a quantum
field interacts linearly with sources of finite width lying at fixed positions.
We show that the central result of Van Hove's 1952 paper on the foundations of
Quantum Field Theory, the orthogonality between the spaces of state vectors
which correspond to different values of the parameters of the theory,
disappears when a well-defined model is considered. We comment on the
implications of our results for the contemporary relevance of Van Hove's
article.
