The 33 Swaiyas are found in the Dasam Granth Sahib one after the other. Akali Phoola Singh when he was a kid memorized all these by heart along with Nitnem Banis, Akal Ustat and a few other Shri Mukhwakh Bani's. Jathedar Sahib Akali Phoola Singh would not eat until he memorized a certain portion as written by Prem Singh Hoti
http://www.scribd.com/doc/241178280/33-Swaiyas-W-English-Translations-and-Annotations-Bhai-Jodh-Singh-1953
33Swaiyas_BhaiJodhSingh_1953.pdf