There is something there but I am not sure what.............the last post.................


https://books.google.com/books?id=R_YWAAAAYAAJ&pg=PA557&lpg=PA557&dq=rock+creek+canal+gate&source=bl&ots=sLHbaXJ_l2&sig=ZKLiMoMfFURA4fFnmhe3Hq9xSrs&hl=en&sa=X&ved=0CE0Q6AEwC2oVChMIwdvMsbCDyAIVQ5YeCh3dqwHg#v=onepage&q=rock%20creek%20canal%20gate&f=false