sentences:  Part of the canal was filled with rubbish in the early twentieth century by the local authority, and was excavated by bottle collectors before restoration began.There is no towpath on a short section to Little Tring bridge, but walkers can follow a minor road to rejoin the canal, which is navigable at this point.A public footpath follows the right bank for most of the way to Gamnel Bridge, but leaves the canal to join the B488 road at Tring.