The "Natick Dictionary", published in 1903 and based on the work of Dr. James H. Trumbull, includes descriptions of vocabulary, mainly from Eliot's Bible but also that of the other missionaries and Roger William's "A Key ...". The documents of the Indians were extensively analyzed by Ives Goddard and Kathleen Bragdon, with the 1988 release of "Native Writings in Massachusett." Reconstructions of gaps in grammar, syntax, vocabulary and pronunciation could be filled by comparison with other related Algonquian languages or by reconstructions based on likely sound changes, such as George F. Aubin's "Proto-Algonquian Dictionary" of 1975.