1900 -1910. As we have already shown, the first decade of the 20th Century saw quite a bit of mountain activity at home in Ireland and in other places. As Michael Fewer has indicated , the Wicklow mountains were being frequented regularly by a wide range of hikers and cyclists, if mainly of the upper and professional classes, as the visitors' book of Mc Guirk's teahouse indicates. The Brotherhood of the Lug had been founded; members of the Dublin Arts Club had been exploring Ireland's mountains and travelling to Wales for the rock clinbing organised by Geoffrey W. Young. The Irish members of the Alpine Club held a dinner in Dublin in 1906.
About an equal number of women as of men visited Mc Guirk's on their visits into the Wicklow Hills, although the women's names were often not recorded (e.g Mr & Mrs F. Frowd and maid). Some of the notable people people who visited were: G.A.J Cole, Director of Geological Survey of Ireland; J.M Synge; J.B. Malone (father of J.B.); Rev. W Doyle, S.J; J. Swift Joly; F.M Browne, S.J.1910-1920. This was a decade of upheaval in Ireland no less than in many other places. The following events had a significant and devastating effect on Irish society: Dublin Lockout 1913; Great War 1914-18 ; 1916 Rising. (Follow the links for detailed accounts). Despite such traumatic occurrances Mc Guirk's continued to be frequented throughout the decade by hikers and cyclists who were venturing into Wicklow's mountains; in 1917 J.J. Cronin beat Hart's time for the return walk from Terenure to Lugnaquilla by more than three hours. Inevitably, however, mountaineering activities were curtailed due to the outbreak of WW 1, notably on the small group of rock climbers, members of the United Arts Club. 'Poignantly, despite O'Brien's return to Young's gatherings (in Wales) after the war, the influence of the little group on Irish climbing ceased, as Sparrow and Julian were killed during the war, while Dickenson suffered from shell shock.' (Paddy O' Leary) Of the many notable people who wrote in Mc Guirk's visitors' book only a few are mentioned here because they feature again in this story: Dr John Healy, Alpine Club member and a founder of the IMC; Joseph Maunsell Hone, wrote Persia in Revolution along with Page Dickinson; Capt. Eoghan O'Brien, R.E, Alpine Club member; Brotherhood of the Lug : Na Sleibhteagaigh
1920-1930. Following the Great War Ireland was convulsed between 1919 and 1923 by the War of Independence that preceded the Irish Civil War. Many of the hill areas that might have been frequented by hikers or mountaineers saw fighting and unrest and became guerilla refuges during the conflicts, somewhat akin to how they were used by Rapparees in earlier times. It would have been a foolhardy soul who ventured into such places for recreational activities. With the end of hostilities in 1923 there was a gradual return to mountain activities in Ireland. As paddy O'Leary indicates it was Claude Wall and friends who were among the earliest to venture into the Dublin and Wicklow hills. In 1925, the 15 year old Harold Johnson began climbing on The Scalp, an area of granite boulders and cliffs near Kiltiernan. At school in Kendal, in the English Lake District, he subsequently was involved, with Maurice Linnell, in the devlopment of the climbing at Buckbarrow Crag near his school.
| Buckbarrow Crag |
| The Scalp (1888 Lovett) |

