Strike out all after the enacting clause and insert the following---
``That the Board of Public Works shall so soon as convenience will permit, detail a competent engineer to survey a route commencing at or near the point where the present location of the Central Rail Road crosses Drury's Creek in Jackson county; thence via Frankfort in Franklin county, Mount Vernon in Jefferson county, and Salem in Marion county to a point on the present location of the aforesaid Rail Road at or near Vandalia. Said Board shall also detail a competent engineer to survey another