As the Survey work in the Cheviot region was finished in the year that James Geikie married, his friend Prof. Ramsay so arranged matters that it was possible for him to take a house at Perth, which remained his headquarters for six years after his marriage, that is until he went to Edinburgh to take the Chair of Geology.

At Perth Mr and Mrs Geikie made many friends, and the former threw himself actively into the life of the place, taking especially a great interest in the Perthshire Society of Natural Science, of which he became president later. This brought him into contact with Sir Thomas Moncrieffe, also at one time president of the Society; Mr Andrew Coates, who took a very great interest in the establishment of the excellent Perth Museum; Dr Buchanan White, and others. James Geikie also gave courses of lectures to ladies on geology during his stay in Perth, and generally did not a little to stimulate an interest in natural science in the town.

The year 1876 was a very full one. In spring he paid a short visit to Norfolk and Suffolk to study some interesting glacial results which his colleague Mr Skertchly had obtained there. At the same time he was working at The Great Ice Age, which had done so well that a second edition was required. Under date 27th June he writes to Mr Horne:—“My new edition will be out, I expect, in October—the first of the season! It is in the printers’ hands now, and we are settling about the size of page and type. Printed the same size of type as last, the volume would be 900 pages, which shows that I have made some additions!”

At the beginning of July Prof. Ramsay wrote to ask him if he would be willing to go to Gibraltar to assist in an investigation of the water-supply there, the work to count as a piece of Survey duty. The invitation was promptly accepted, and on 11th September James Geikie left Perth on his long journey to the South. He stopped a couple of days in London, and did not finally reach Gibraltar till 19th September. Here he remained till 25th October, much longer than he had expected, and in addition to doing a large amount of geological work, in what both he and Prof. Ramsay found most oppressive heat, received much kindness and hospitality from the civil and military officials, and made many interesting excursions. It was apparently the first time he had seen subtropical vegetation, and his letters to his wife are filled with accounts of all he saw, written in a spirit of almost boyish glee, and accompanied by much groaning over the heat, and the resultant thirst. Even bathing afforded little refreshment, for he says ruefully:—“Even in the water one has much the feeling that a herring must have when it is newly put into a pot upon the fire. All the springs,” he adds, “yield half-warm water—everything indeed is baked, blistered, and boiled.”

The abundant hospitality, delightful though it was, naturally took up much time, the hosts perhaps not fully realising that the two geologists had a fairly heavy piece of work on hand, and James Geikie complains that it was difficult even to find time to write letters to his wife, in the midst of the ceaseless round of work and pleasure. An interesting fact, which he does not fail to record, is that at a Mess dinner at which he and Prof. Ramsay were the guests of honour, the military band played Scotch music in compliment to their nationality, and among the airs James Geikie recognised a selection arranged by his father for a Scotch regiment many years before.

Among the excursions was included one to the African coast, where the two made a short stay in Tangier: the diary, with characteristic orderliness, records the purchases made here for the people at home. But in addition to making these, the two found time to study the geology of the coast between Ceuta and Cape Spartel.

A letter to Mr Horne, written from Perth on 18th November, not long after his return home, makes some mention of the tour, and of the other events of a crowded summer.

I heard all about your Shetland work. It did my heart good, and right glad I am that it has been done by a Survey man.... You would hear about Skertchly’s find. I was down there again ten days ago at Ramsay’s request, to see the evidence again.... In my new edition, which is out (and selling well!), I go much more fully into the English Drifts. I got to-day a long letter from Darwin, along with a copy of his new edition of Geological Observations. His letter is very complimentary, and of course that is gratifying to me, for I look upon Darwin as a real genius.

I enjoyed my Gibraltar trip very much. Ramsay was very jolly and in excellent spirits all the time. We did have some fun, I can tell you. Also we crossed over to Africa and had a run amongst the Moors. The result of our Survey was so far satisfactory as it enables us to say very positively what is best to be done in the matter of the water-supply.

There are two letters from Darwin about this date. One has been already quoted ([p. 27]). In the other, which is taken up largely with a geological discussion, he says:—“Allow me to tell you with what extreme pleasure and admiration I have just finished reading your Great Ice Age. It seems to me admirably done and most clear. Interesting as many chapters are in the history of the world, I do not think that any one comes nearly to the glacial period or periods. Though I have steadily read much on the subject, your book makes the whole appear almost new to me.”