 yorkshire boy chimneysweep falsely accused theft crooked master runs away falls treacherous local river transported underwater realm makes many friends rescues mythical water babies evil sharkbr br based book charles kingsley lovely childrens film half liveaction half animation grim evocative depiction victorian times terrifically enjoyable undersea adventure really two films one somehow complement combine much richer whole animation tony cuthbert jack stokes miroslaw kijowicz wonderful photography ted scaife music phil coulter bill martin pender great roughdiamond quality literal fish water  love moment hes top mansion sees chimneys shouts blimey  top voice mason cribbins filthiest nastiest bullies could hope see costume drama if want see real victorian values watch sense sensibility watch this whitelaw pertwee who umpteen voices percival excellent good childrens movie  good old singalong fun also little bit thoughtful sad frightening high cockallorum 