Conservation Of Marine Archaeological Objects

Over the past twenty years there has been a significant increase in underwater activities such as scuba diving which, coupled with the adventure andromance always associated with shipwrecks, has led to rapid developments in the discovery and excavation of shipwrecked material. These shipwrecks are invaluable archaeological 'time capsules', which in themajoriety of cases have come to an equilibrium with their environment. As soon as artefacts on the wreck site are moved, this equilibrium is disturbed, and the artefacts may commence to deteriorate, sometimes in a rapid and devastating fashion. In fact excavation without having conservation facilities available is vandalism--the artefacts are much safer being left on the sea bed. Such famous shipwrecks as the Mary Rose (1545), the Wasa (1628) and the Batabia (1629) have not only brought the world's attention to these unique finds, but have also produced tremendous conservation problems. The treatment of a 30 metre waterlogged wooden hull or large cast iron cannon is still causing headaches to conservators.

Master conservator Douglas R. Armstrong imparts his many years of first-hand, practical experience in the field of marine artifact conservation within the pages of "Practical Conservation of Archaeological Objects". This newly updated version for 2012 includes his methods of cleaning coins recovered from a number of shipwrecks, in particular the inventory of the Chanduy Reef Capitana, and the Consolacion in Ecuador. This is a manual of proven methods that all collectors, be they archaeologists or treasure hunters, at land or at sea, will find indispensable when restoring and conserving a wide range of objects, ranging from buttons, cannon, sword handles, or glassware, to pieces of eight. The author was the first craftsman to handle many objects hereto untouched by conservators of the day, not the least of which are delicate pistols, one of the first wrought iron guns, the original Tumbaga bars of the Bahamas, and a bronze saker made for King Henry VIII. The book is richly illustrated with before and after photos of these projects and is fully indexed. The technology and tools used are described in great detail. Truly, this is a manual that every conservator needs at hand.

In September 2008, a combined annual conference for the Australasian Institute for Maritime Archaeology, the Australasian Society for Historical Archaeology and the Australian Association for Maritime History was held at the magnificent Institute Building of the State Library of South Australia in Adelaide. The conference was entitled "Archaeology from Below - Engaging the Public" and hoped to address the relationship between archaeology and the public. Papers presented in this session broaden discussions on the interactions of professionals and the public with respect to in situ stabilisation, preservation and management of terrestrial and underwater cultural heritage sites and their associated archaeological finds.

Originally published in hardback: Portsmouth, England: Mary Rose Trust, 2003.

The marine environment is almost ideal for the preservation of artefacts and, until relatively recently, it also provided complete protection from destruction by man. However, the aqualung has made most shallow underwater sites accessible, leading to widespread plundering. Current deep-sea bed technology now threatens deep water sites. There is a need for immediate international action to preserve the man-made environment, alongside the natural one. The enunciation of legal rules to protect the underwater cultural heritage is a complex issue, involving a matrix of interests and laws, both international and national.

This is a Foreword by an archaeologist, not a conservator, but as Brad Rodgers says, “Conservation has been steadily pulled from archaeology by the forces of specialization”(p. 3),andhewantstoremedythatsituationthroughthismanual. He seesthisworkasa“calltoactionforthenon-professionalconservator,”permitting “curators, conservators, and archaeologists to identify artifacts that need prof- sional attention and, allow these professionals to stabilize most artifacts in their own laboratories with minimal intervention, using simple non-toxic procedures” (p. 5). It is the mission of Brad’s manual to “bring conservation back into arch- ology” (p. 6). The degree of success of that goal depends on the degree to which archaeologists pay attention to, and put to use, what Brad has to say, because as he says, “The conservationist/archaeologist is responsible to make preparation for an artifact’s care even before it is excavated and after its storage into the foreseeable future”. . . a tremendous responsibility” (p. 10). The manual is a combination of highly technical as well as common sense methods of conserving wood, iron and other metals, ceramics, glass and stone, organicsandcomposits—afarbetterguidetoartifactconservationthanwasava- able to me when I ?rst faced that archaeological challenge at colonial Brunswick Town, North Carolina in 1958—a challenge still being faced by archaeologists today. The stage of conservation in 1958 is in dramatic contrast to the procedures Brad describes in this manual—conservation has indeed made great progress. For instance,acommonprocedurethenwastoheattheartifactsredhotinafurnace—a method that made me cringe.