She donned the Persian chader and veil

On Tuesday, June 12, 1906, after partaking of the midday meal with Him, 'Abdu'l-Bahá commanded me to go to visit the Holy Tomb at Bahji in company with my wife. She donned the Persian chader and veil (* As she did all through our visit to Akka and then during the entire length of our stay in Persia, in accord with the Command of 'Abdu'l-Bahá. *), and we took the baby with us. While my joy was great in revisiting the Holy Tomb, after years of separation, and in presenting Wife and Child at the Holy Threshold, the memory of the past years when I often visited the Tomb and Bahji with 'Abdu'l-Bahá, as well as the thought of the present changed conditions due to His imprisonment, weighed heavily upon my heart.

https://bahai-library.com/ali-khan_pilgrim-notes_1906#h16