AJO â It was a simple message scrawled into a basalt rock lying near-empty cans of beans and jugs of water that volunteers had left deep in the Sonoran Desert for undocumented immigrants passing through: âGracias.â But to Mikal Jakubal, who, as a volunteer with the Ajo Samaritans, had been making weekly trips into the backcountry to stock water drop locations, the note was affirmation that the groupâs efforts were appreciated. âFor the most part, we will never hear from the people who use this,â Jakubal said. âWe donât know what it was like getting to this point. We donât know what is after this. But you have this one little connection across massively different life experiences: They found some water and you found a thank you note.â