during that era. Maynila had been partially rebuilt by the following year, 1571, when the full forces of de Goiti's superior, Miguel López de Legazpi, arrived in the city to claim it as a territory of New Spain. After extensive negotiations with the leaders of Maynila and those of the neighbouring settlement in Tondo, Maynila was declared as the new Spanish city of Manila on June 24, 1571, effectively ending Maynila's history as an independent polity. Sources Laura Lee Junker, in her 1998 review of primary sources regarding archaic Philippine polities, lists the primary sources of information regarding the river delta polities of Maynila and Tondo as "Malay texts, Philippine oral traditions, Chinese tributary records and geographies, early Spanish writings, and archaeological evidence." Primary sources for the history of Rajah Kalamayin's Namayan, further upriver, include artifacts dug up from archaeological digs (the earliest of which was Robert Fox’s work for the National Museum in 1977) and Spanish colonial records (most notably those compiled by the 19th century Franciscan Historian Fray Felix Huerta). Junker noted the inherent biases of each of the written sources, emphasizing the need to counter-check their narratives with one another, and with empirical archeological evidence. Etymology Maynilà comes from the Tagalog phrase may-nilà, which translates to "where indigo is found." Nilà is derived from the Sanskrit word nīla (नील) which refers to indigo, and, by extension, to several plant species from which this natural dye can be extracted. The Maynilà name is more likely in reference to the presence of indigo-yielding plants growing in the area surrounding the settlement, rather than Maynilà being known as a settlement that trades in indigo dye, since the settlement was founded several hundred years before indigo dye extraction became an important economic activity in the area in the 18th century. The native Tagalog name for the indigo plant, tayum (or variations thereof) actually finds use in another toponym within the Manila area: Tayuman, "where the indigo (plant) is." An inaccurate but nevertheless persistent etymology asserts the origin of the placename as may-nilad ("where nilad is found"). Here, nilad refers to either: (incorrectly) the water hyacinth (Eichhornia crassipes), which is a recent introduction to the Philippines from South America and therefore could not have been the plant species referred to in the toponym; or (correctly) a shrub-like tree (Scyphiphora hydrophyllacea, formerly Ixora manila Blanco) found in or near mangrove swamps, and known