Mesh and Brep

A few questions; I've looked through the SDKs a bit, but might be looking for the wrong thing. It seems strange to me that there Breps have .Faces and .Edges as well as BRepFace and BRepEdge which have AdjacentEdges and AdjacentFaces, but nothing exists for indexed, connected or adjacent Vertices, only .DuplicateVertices

For meshes, the opposite problem meshFace has .a .b .c .d (though is there anything like meshfacevertices used to be, an array of all vertices for all faces at once) and MeshVertexList has .GetConnectedVertices, but is there a way to select the edges directly? For example, to find the faces adjacent to an edge?

Thanks.