Who is the speaker in both of poems The Creation and Last Judgment?

You are referring to the poems "The Creation" and "The Last Judgment" by William Blake. While the poems don't explicitly name a speaker, it's widely accepted that the voice in both poems is God.

Here's why:

* Thematic Content: Both poems deal with divine themes: creation and judgement. The speaker in both possesses immense power and knowledge, aligning with traditional concepts of God.

* Authorial Intent: Blake was deeply interested in religious themes and often used his poetry to explore his personal interpretations of God and biblical stories.

* Stylistic Clues: The language used in the poems is grand and authoritative, suggesting a powerful, all-knowing being.

While the poems might not directly state "God" as the speaker, the context and content strongly point towards a divine voice.