The usual indication of age by annual rings of growth cannot be trusted in the case of the yew, owing to a peculiarity in its habit of growth. Injury to a main branch often causes all that part of the stem with which it is connected to die under the bark right down to the ground, the injury being repaired by a rush of young shoots from the living bark; and these, if they get head room, grow vigorously and ultimately become welded together. This process vitiates the record of annual rings, and although it is a means of rejuvenescence which no doubt prolongs the life of the tree, it would not be safe to assume that there is any yew in the British Isles more than five hundred years old. Dr. John Lowe was at great pains to collect evidence on this matter, and failed to obtain _documentary_ proof of any yew exceeding 250 years of age. The practice of planting yews in churchyards helps to account for the extravagant statements about the age of certain trees. Generation after generation has become familiar with seeing a yew beside the parish church; the date of the building of the church being accurately known, it comes to be assumed that church and tree are coeval. Dr. Lowe gives a case in point of two churches in contiguous parishes in Kent, each of which has a large yew in the churchyard reckoned to be the same age as the church. One of these yews measures 16 feet in girth, the other 17 feet; but as one of the churches dates back to the eleventh century, and the other only to the fourteenth, the tradition about the trees would have one yew to be three hundred years older than the other, although only differing in girth by one foot.[24] The poisonous properties of the yew are pretty generally known; in fact, Pliny says that the adjective _toxicus_, poisonous, was once written _taxicus_ from _taxus_, the yew. But in the _English Encyclopædia_ is the mischievous statement--"It is now well known that the fruit of the yew may be eaten with impunity." It is quite true that the pulp surrounding the seed, with its sweet but sickly taste, does not possess the poisonous properties of the foliage and young bark; but the seed itself is deadly, numerous fatal cases having been recorded as the result of swallowing it. On the whole, therefore, it is best to give children nice chocolates on condition that they leave the pretty yew berries alone. A yew bearing yellow berries originated at Glasnevin about 100 years ago and has been pretty extensively propagated in Ireland, but I have never happened to see it in fruit, though I have a clear recollection of the weird yew avenue at Glasnevin. The Irish or Florence Court yew, described above, found high favour with garden designers seventy or eighty years ago, owing to its fastigiate habit; but, at best, it is a funereal object, and a more cheerful effect may be obtained by planting Incense Cedar (_Libocedrus decurrens_), Lawson Cypress or Pencil Cedar (_Juniperus virginiana_).