Who is the bearer of ḥāl in raʾaytu Zaydan mubtasiman?

Appendix to Faṣl and Waṣl: Circumstantial Clauses, Wāw and Pronominal Linkage

• The speaker implied in raʾaytu
• The verb raʾaytu
• Zaydan, the object
• Mubtasiman itself