After Port Royal (in the West Indies) was submerged, at the close of the seventeenth century, sailors in those parts for many years had {414} stories of anchoring in the chimneys and steeples, and would declare they heard the church bells ringing beneath the water, agitated by the waves or spirits of the deep. The case of the Round Towers seen in Lough Neagh, I need not bring forward, as no sound of bells has ever been heard from them. There is one _lost church_ so famous as to occur to the mind of every reader, I mean that of the Ten Tribes of Israel. After the lapse of thousands of years, we have here an historical problem, which time, perhaps, will never solve. We have a less famous, but still most interesting, instance of a lost church in Greenland. Soon after the introduction of Christianity, about the year 1000, a number of churches and a monastery were erected along the east coast of Greenland, and a bishop was ordained for the spiritual guidance of the colony. For some four hundred years an intercourse was maintained between this colony and Norway and Denmark. In the year 1406 the last bishop was sent over to Greenland. Since then the colony _has not been heard of_. Many have been the attempts to recover this lost church of East Greenland, but hitherto in vain. I could send you a Note on a cognate subject, but I fear it would occupy too much of your space,--that of _Happy Isles_, or _Islands of the Blessed_. The tradition respecting these happy isles is very wide-spread, and obtains amongst nearly every nation of the globe; it is, perhaps, a relic of a primeval tradition of Eden. Some have caught glimpses of these isles, and some more favoured mortals have even landed, and returned again with senses dazzled at the ravishing sights they have seen. But in every case after these rare favours, these mystic lands have remained invisible as before, and the way to them has been sought for in vain. Such are the tales told with reverent earnestness, and listened to with breathless interest, not only by the Egyptians, Greeks, and Romans of old, but by the Irishman, the Welshman, the Hindoo, and the Red Indian of to-day. EIRIONNACH. * * * * * PHOTOGRAPHIC NOTES AND QUERIES. _Photographic Collodion_ (Vol. vii., p. 314.).--In a former communication I pointed out the wide differences in the various manipulations prescribed for making the photographic _gun cotton_ by several photographers: differences most perplexing to persons of small leisure, and who are likely to lose half the opportunities of a photographic season, whilst puzzling over these diversities of proceeding. Suffer me now to entreat some one to whom all may look up (perhaps your kind and experienced correspondent DR. DIAMOND will do this service, so valuable to young photographers) to clear up the differences I will now "make a note of," viz. as to the amount of dry photographic gun cotton to be used in forming the prepared collodion.