Magnetic detection of ship ballast deposits and anchorage sites in King Herod's Roman harbour,Caesarea Maritima,Israel

Ballast stone deposits are a common feature of sediments in ancient harbour basins but are often overlooked as a potential source of archaeological information. Recent geophysical investigations at Caesarea Maritima in Israel have discovered a thick, laterally extensive ballast layer in the area seaward of the 1st c. BC Roman harbour. The ballast deposits were identified by low-relief mounds on the seabed with elevated magnetic intensities. Jet probing and excavation of magnetic anomalies at several locations revealed a 20–60 cm thick rubble layer containing large quantities of Late Roman and Byzantine pottery, local sedimentary boulders (kurkar sandstone, limestone cobbles) and foreign igneous and metamorphic boulders (granite, schist, volcanics; ca. 50%). The foreign boulders and pottery identify the rubble layer as ballast and ships refuse jettisoned by merchant ships outside the harbour. The strong magnetic contrast between the ballast deposits and the natural seabed sediments is attributed to the high magnetic susceptibility (>10⁻³ SI) of crystalline boulders and pottery materials within the ballast rubble.     

‘From motives of generosity,as well as self‐preservation’: Thomas Branagan,Colonization, and the Gradual Emancipation Movement

The idea of colonizing free blacks in areas distant from white settlement has had a long history in the American antislavery movement. A decade before the American Colonization Society formed in 1817, an Irish immigrant in Philadelphia, Thomas Branagan, argued that creating a black settlement in the newly‐acquired Louisiana Purchase territories would encourage slaveholders to emancipate their bondspersons while also saving white society from a number of ills he associated with a biracial society, most notably racial mixing, poverty and violence. Branagan’s plan never gained acceptance, but the idea of sending free blacks to the American West to encourage emancipation did catch the attention of gradual emancipationists associated with the American Convention of Abolitionists. This group considered a similar scheme as the lesser of two evils once the Colonization Society began its campaign to send America’s blacks “back” to Africa. Neither plan met with success, but their existence reveals an important link between colonization and the early antislavery movement.     

The Epipaleolithic (Iberomaurusian) from Grotte des Contrebandiers,Morocco

First identified 100 years ago, the Iberomaurusian is an Epipaleolithic industry that was described from a number of sites across western North Africa. One of these is Grotte des Contrebandiers (Smugglers’ Cave) in Morocco, where Abbé Jean Roche recovered Iberomaurusian materials in excavations in the late 1950s. Although the lithics were published in the early 1960s, subsequent changes in methods and in assessing the interpretive potential of lithic assemblages necessitated a restudy of these collections from Contrebandiers. This study led to a better understanding of the lithic types present and of the use of particular stone raw materials. Iberomaurusians emphasized lithic strategies that maximized use of fine-grained stone to the extent that pièces esquillées should be, among others, a defining criterion for this lithic industry.     

The Growth of the Evaluation Tree in the Policy Analysis Forest: Recent Developments in Evaluation

The practice and profession of evaluation is continually evolving. From its early origin in the Great Society years of the 1960s, through its golden years of the 1970s, its transformation under the fiscal conservatism of the Reagan era in the 1980s, and in its maturation during the performance and results era of the 1990s, the field of evaluation continues to evolve in response to broader trends in society. This article examines recent developments and trends in the practice and profession of evaluation. Structured around the evaluation theory tree, the presentation of these developments elaborates on the three main branches of evaluation: methods, use, and valuing. The concluding discussion briefly addresses the central role of evaluation—and other types of knowledge production—in providing actionable evidence for use in public policy and program decision making.