The present paper explores the effects of the use of loci mnemonics by expert people when series of three items (triples) must be memorized. The most general results of the experiments here presented is that progressive elaboration instructions make loci mnemonics not only powerful with a series of materials, but also capable of maintaining the order of information within and between the loci. Finally the effects of loci mnemonics appear stronger in subject with good performance on a memory localization test requiring them to remember where pictures appeared on the pages of a book.