  In subsequent writings Husserl experimented with several different ways of conceiving of retentions – see Kortooms (2002) and de Warren (2009) for a full picture – but one development is of particular significance. In his early lectures, although it is not always evident from the lectures themselves, it seems that Husserl conceived of retentions in terms of a general conception of perceptual experience that he had developed earlier, in his Logical Investigations. According to this ‘apprehension-content’ scheme, retentions – like all forms of perceptual consciousness – are real sensory-like contents in experience, contents that are animated by an act of apprehension, and thus seem a certain degree past. In the years following the 1906–7 period, Husserl came to think that it was wrong to apply the apprehension-content scheme to retentions.