Acknowledgements
Funding was provided by the National Center for Preservation Technology and Training, National Park Service, United States Department of Interior, Grant Agreement P19AP00143. Historic brick specimens were provided by Dr Lu Ann DeCunzo, Anthropology Department, University of Delaware. The micro-CT equipment was made available to me by the Advanced Materials Characterization Lab at University of Delaware, and I would particularly like to thank the facility manager Gerald Poirier. I would also like to thank Mike Marsh at Object Research Systems for help with developing protocols for analyzing the 3D images in Dragonfly 4.1.
Disclosure statement
No potential conflict of interest was reported by the author(s).