The following text is an extract from "The Death of Grass" written in 1956 by Samuel Youd (aka John Christopher).

photo of John Christopher The novel, whose author was born in Lancashire in 1922,  is set in the future, after a plant virus has killed off grass and food crops throughout the world, creating widespread famine and the breakdown of civilisation.   The central characters are travelling from the South of England to find a hidden valley in the Lake District where they believe that they will be able to survive and defend themselves from the rioting and looting that is spreading throughout the country.  
The story was made into a film called  "No Blade of Grass", produced and directed by Cornel Wilde, and released in 1970.

In March 2009, as part of a BBC Radio 4 science fiction season, a radio adaptatation was broadcast in five episodes, narrated by David Mitchell.

The following is an extract, relating their journey down Garsdale from Wensleydale.  Some details are not quite accurate (indicated thus: [???]).  

Occasional clarifications are shown thus: [...].  Mention of local places has been highlighted in bold.  
The extract is reproduced here under "fair use of a relatively short quotation" licence.

As they climbed up to Mossdale Head, the sky darkened continually, and gusts of rain swept in their faces. These increased as they neared the ridge [???], and they breasted it to see the western sky black and stormy over the rolling moors. They had four light plastic mackintoshes in the packs, which John told the women to put on. The boys would have to learn to contend with being wet; although the temperature was lower than it had been, the day was still reasonably warm. The rain thickened as they walked on. Within half an hour, men and boys were both soaked. John had crossed the Pennines by this route before, but only by car. There had been a sense of isolation about the pass even then, a feeling of being in a country swept of life, despite the road and the railway line that hugged it [further back]. That feeling now was more than doubly intensified. There were few things, John thought, so desolate as a railway line on which no train could be expected. And where the pattern of the moors seen from a moving car had been monotonous, the monotony to people on foot, struggling through rain squalls, was far greater. The moors themselves were barer, of course. The heather still grew, but the moorland grasses were gone; the outcrops of rocks jutted like teeth in the head of a skull. During the morning, they passed occasional small parties heading in the opposite direction. Once again, there was mutual suspicion and avoidance. One group of three had their belongings strapped on a donkey. John and the others stared at it with amazement. Someone presumably had kept it alive on dry fodder after the other beasts of burden were killed along with the cattle, but once away from its barn it would have to starve. Roger said: 'A variation of the old sleigh-dog technique, I imagine. You get it to take you as far as you can, and then eat it.'   'It's a standing temptation to any other party you happen to meet, though, isn't it?' John said. 'I can't see them getting very far with that once they reach the Dale.' Pirrie said: 'We could relieve them of it now.' 'No,' John said. 'It isn't worth our while, in any case. We've got enough meat to last us, and we should reach Blind Gill [the hidden valley] tomorrow. It would only be unnecessary weight.' Steve began limping shortly afterwards, and examination showed him to have a blistered heel. Olivia said: 'Steve! Why didn't you say something when it first started hurting?' He looked at the adult faces surrounding him, and his ten-year-old assurance deserted him. He began to cry. 'There's nothing to cry about, old man,' Roger said. 'A blistered heel is bad luck, but it's not the end of the world.' His sobs were not the ordinary sobs of childhood, but those in which experience beyond a child's range was released from its confinement. He said something, and Roger bent down to catch his words. 'What was that, Steve?' 'If I couldn't walk -- I thought you might leave me.'  Roger and Olivia looked at each other. Roger said: 'Nobody's going to leave you. How on earth could you think that?'   'Mr. Pirrie left Millicent,' Steve said.  John intervened.  'He'd better not walk on it. It will only get worse.'   'I'll carry him,' Roger said. 'Spooks, will you carry my gun for me?'   Spooks nodded. 'I'd like to.' 'You and I will take him in turns, Rodge,' John said. 'We'll manage him all right. Good job he's a little 'un.' Olivia said: 'Roger and I can take the turns. He's our boy. We can carry him.' She had not spoken to John since the incident of Jane and Pirrie. John said to her: 'Olivia-I do the arranging around here. Roger and I will carry Steve. You can take the pack of whoever happens to be doing it at the time.' Their eyes held for a moment, and then she turned away. Roger said: 'All right, old son. Up you get.' Their progress immediately after this was a little faster, since Steve had been acting as a brake, but John was not deceived by it. The carrying of a passenger, even a boy as small as Steve, added to their difficulties. He kept them going until they had nearly got to the end of Garsdale, before he called a halt for their midday meal. The wind, which had been carrying the rain into their faces, had dropped, but the rain itself was still falling, and in a steadier and more soaking downpour. John looked round the unpromising scene. 'Anybody see a cave and a pile of firewood stacked inside? I thought not. A cold snack today, and water. And we can rest our legs a little.' ` Ann said: 'Couldn't we find somewhere dry to eat it?' About fifty yards along the road, there was a small house, standing back. John followed her gaze towards it. 'It might be empty,' he said. 'But we should have to go up to it and find out, shouldn't we? And then it might not be empty after all. I don't mind us taking risks when it's for something we must have, like food, but it isn't worth it for half an hour's shelter.' 'Davey's soaked,' she said. 'Half an hour won't dry him out. And that's all the time we can spare.' He called to the boy: 'How are you, Davey? Wet?' Davey nodded. 'Yes, Dad.' . 'Try laughing drily.' It was an old joke. Davey did his best to smile at it. John went over and rumpled his wet hair. 'You're doing fine,' he said. 'Really fine.'

The western approach to Garsdale had been through a narrow strip of good grazing land [???] which now, in the steady rain, was a band of mud, studded here and there with farm buildings. They looked down to Sedbergh, resting between hills and valley on the other side of the Rawthey. Smoke lay above it, and drifted westwards [???] along the edge of the moors. Sedbergh was burning. 'Looters,' Roger said. John swung his glasses over the stone-built town. 'We're meeting the north-western stream [of people] now; and they've had the extra day to get here. All the same, it's a bit of a shaker. I thought this part would still be quiet.' 'It might not be so bad,' Roger said, 'if we cut north [over the Howgills] straight away and get past on the higher ground. It might not be so bad up in the Lune valley.' Pirrie said: 'When a town like that goes under, I should expect all the valleys around to be in a dangerous condition. It is not going to be easy.'  John had directed the glasses beyond the ravaged town to the mouth of the dale along which they had proposed to travel. He could make out movements but it was impossible to know what they constituted. Smoke rose from isolated buildings. There was an alternative route, across the moors to Kendal, but that also took them over the Lune. In any case if Sedbergh had fallen, was there any reason to think things were any better around Kendal?