{Corresp: A. Fowler; H. Spencer-Jones; Henrietta S. Leavitt; Harlow Shapley; R. A. Sampson; Joel Stebbins; W. W. Campbell; Frank Dyson; J. A. Parkhurst; J. Baillaud; P. J. Melotte; H. H. Turner. folded, oversize}
{Corresp: Harlow Shapley; A. Fowler; J. A. Parkhurst; H. H. Turner; J. G. Hagen; H. Spencer-Jones; J. Baillaud; A. S. Eddington; R. A. Sampson; J. Halm; J. Stebbins; W. W. Campbell. folded}
{Corresp: A. Fowler; P. J. van Rhijn; R. A. Sampson; W. Dziewulski; J. G. Hagen; Robert H. Baker; Joel Stebbins; Harlow Shapley; Ejnar Hertzsprung; H. Spencer-Jones; J. A. Parkhurst. One thick item with 3 staples. folded}
{Corresp: F. J. M. Stratton; J. H. Oort; Jules Baillaud; P. J. van Rhijn; H. Shapley; Jan Schilt; W. Hassenstein; Cecilia Payne-Gaposchkin; S. A. Mitchell}
{Corresp: F. J. M. Stratton; P. J. van Rhijn; A. Bemporad; R. A. SAmpson; P. J. Melotte; H. L. Vanderlinden; Bertil Lindblad; H. Plaskett; Östen Bergstrand; W. M. H. Greaves; Raymond S. Dugan; Harlow Shapley; Charles Fabry; Cecilia H. Payne; W. Hassenstein; J. Hellerich; K. Graff; Ejnar Hertzsprung; H. Spencer-Jones; A. Pannekoek; H. von Zeipel; K. G. Malmquist; W. K. Green; Gilbert Rougier. folded}
{Concerns meeting of American section of proposed IAU in March 1919 & preparations for Brussels meeting of proposed IAU on July 18, 1919. Corresp: Joel Stebbins; S. I. Bailey; F. C. Jordan; J. A. Parkhurst; W. W. Campbell}
