The phrase "hadst picture of" can be substituted with a variety of synonyms depending on the context of the sentence. Some potential options include "possessed an image of," "held a photograph of," "owned a snapshot of," "carried a portrait of," or "had a visual representation of." These alternatives all convey a similar meaning to "hadst picture of" but offer slight variations in phrasing and tone. Ultimately, the choice of synonym will depend on the writer's intended meaning and desired level of formality.