Agas produced several documents to publicise his services to potential clients. The longest is a published 20-page pamphlet entitled "A Preparative to Platting of Landes and Tenements for Surveigh" (1596), in which he advertises his methods of surveying (including the use of the theodolite), defends the practical advantages to the landlord of having a map of his property, and condemns the less scientific techniques of untrained surveyors. He praises the convenience and accuracy of the theodolite over the older surveying technology of the plane table. He concludes by saying that he hopes to write a more extended technical treatise on the subject.