In this paper, we provide a comprehensive Minimalist analysis of the apparent free variation between pronouns and anaphors in snake-sentences. Three sets of data provide the basis for the analysis: hitherto unobserved restrictions on quantifier-pronoun relationships, classical observations about the role of perspective or point of view (Cantrall 1974), and interpretive effects concerning the nature of the locative relationship (Kuno 1987). We propose an analysis of spatial prepositions in terms of Svenonius’ (2006) AxPartP. Spatial interpretations may be object-centered or observer-centered. We correlate these two interpretations with two distinct grammatical representations. The object-centered interpretation involves an Agree relation between AxPart and the complement of P, the observer-centered interpretation is the result of a binding relationship between AxPart and the Speaker, represented in MoodEvid P. An Agree relation requires the presence of the complex anaphor himself, whereas binding of AxPart by the Speaker is only compatible with the pronoun him.