I am preparing a message on Noah's Ark, and for the life of me, I can't find a reference which I know exists on the typologies found on the Ark. I know that it is a type of the Savior, Jesus Christ, it is a type of the believer's security in the savior, it is a type of the permanence of God's judgment, etc. But, I remember when I was in seminary, that somebody wrote some typology on the material (gopherwood), the bitumen, and the size of the Ark (well, probably not on this one). Is there anyone here who can refer me to a site where I can do this research ? Or are you familiar with the said typologies ? I posted this question in another forum, and all they could give me was dictionary definitions. Thanks.