December 15. On this date in 1922, Shoghi Effendi returned to Haifa. On April 5, 1922, some four months after returning to Haifa subsequent to the death of ‘Abdu’l-Bahá, Shoghi Effendi left Haifa with his eldest cousin and close friend, Ruhi Afnan who he would later declare a Covenant-breaker, for rest and relaxation in the Bernese Oberland in the Swiss Alps.

December 15. On this date in 1922, Shoghi Effendi returned to Haifa. On April 5, 1922, some four months after returning to Haifa subsequent to the death of ‘Abdu’l-Bahá, Shoghi Effendi left Haifa with his eldest cousin and close friend, Ruhi Afnan who he would later declare a Covenant-breaker, for rest and relaxation in the Bernese Oberland in the Swiss Alps. In his absence, Shoghi Effendi placed Bahíyyih Khánum as Head of the Cause, and later that month the "Star of the West" magazine would publish letters from Shoghi Effendi and Bahíyyih Khánum explaining the situation. Ruhi Afnan would be declared a Covenant-breaker in a series of cablegrams in the 1950's.

From "Star of the West" magazine, Volume 14, Issue 4...

Important Letters from Shoghi Effendi and Bahaeyeh Khanum, the Greatest Holy Leaf
Photograph of the original letter written by Shoghi Effendi and translation of some, sent to the STAR OF THE WEST by his honor Mirza Hadi Shirazi, the noble father of Shoghi Effendi, through Dr. Zia M. Bagdadi. This photograph and the following original letter (from the Greatest Holy Leaf) reached this country after the same recently sent out by the National Spirtual Assembly to the Assemblies throughout America:

He Is God!
This servant, after that grievous event and great calamity—the ascension of His Holiness Abdul-Baha to the Abha Kingdom—has been so stricken with grief and pain and so entangled in the troubles (created) by the enemies of the Cause of God, that I consider my presence here, at such a time and in such an atmosphere, is not in accordance with the fulfillment of my important and sacred duties.
For this reason, unable to do otherwise, I have left for a time the affairs of the Cause, both at home and abroad, under the supervision of the Holy Family and the headship of the Greatest Holy Leaf—may my soul be a sacrifice to her—until, by the Grace of God, having gained health, strength, self-confidence and spiritual energy, and having taken into my hands, in accordance with my aim and desire, entirely and regularly the work of service, I shall attain to my utmost spiritual and aspiration.
The servant of His Threshold, (April, 22) (Signed) SHOGHI
Letter from the Greatest Holy Leaf, Bahaeyeh Khawwm, sent to the Editors of the STAR OF THE WEST:
He Is God!
To the servants of the Blessed Beauty and the dear friends of His Holiness Abdul-Baha!
Although the hearts of the people of Bahá are intensely burning on account of the great calamity (of the ascension of Abdul-Baha), and the sobbing and sighing of the friends have reached the ears of the Supreme Concourse and the Hosts of Holiness in the Abha (Most Glorious) Paradise, yet, because this day is the day of service and this hour is the hour of diffusing the fragrances, the friends of God must, like a bright flame, arise in service to the Cause of God and surpass one another (in service). They should be like penetrating meteors, expelling every disloyal covenant-breaker, in order that in the Preserved Tablet of God, they may be recorded with the group who has fulfilled the Covenant and Testament of God.
His Holiness, the Guardian of the Cause of God, the Primal Branch, the joy of the people of Baha—Shoghi Effendi—because of this great calamity, most painful event, infinite sorrow and the severity of the effect upon himself—has desired to travel for several days, that he may regain his health and have rest. Then he will return to the Holy Threshold, arise in service to the Cause of God and perform his duties.
According to a letter written by his own hand, which is enclosed, he has appointed this prisoner to supervise and manage the affairs of the Cause, through consultation with the Holy Family, during his absence. Therefore, this perishable one, temporarily, has organized an assembly to act according to the advice of the souls who were appointed and nominated by him—His Holiness Shoghi Effendi.
I am hopeful, that during the period of his absence, the friends of God and the maid-servants of the Merciful may show forth great efforts in the progress of the Cause of God, and the Cause of God may spread rapidly.
Verily, He is Compassionate and Merciful to His Servants.
(Signature and seal) BAHAEYEH.
(Month of Shaban, 1340—April 1922. Translated by Dr. Zia M. Bagdadi, Chicago, May, 1922.)

The cablegrams concerning the declaration of Ruhi Afnan a Covenant-breaker include one from December 13, 1951 titled "Old and New Covenant-Breakers" where Shoghi Effendi says, "Evidences multiplying attesting Ruhi's increasing rebelliousness, efforts exerted my eldest sister pave way fourth alliance members family Siyyid 'Alí involving marriage his granddaughter with Ruha's son and personal contact recently established my own treacherous, despicable brother Riaz with Majdi'd-Din, redoubtable enemy Faith, former henchman Muhammad-'Ali, Archbreaker Bahá'u'lláh's Covenant. Another cablegram sent May 17, 1953, titled "Treacherous Ruhi Afnan", stated "Treacherous Ruhi Afnan, not content with previous disobedience, correspondence with Ahmad Sohrab, contact with old Covenant-breakers, sale, in conjunction with other members of family, of sacred property purchased by Founder of Faith, and allowing his sister to marry son of 'Abdu'l-Bahá's enemy, is now openly lecturing on Bahá'í movement, claiming to be its exponent and is misrepresenting the teachings and deliberately causing confusion in minds of authorities and the local population. Inform National Assemblies."