“For people, 'here' signifies not merely a physical space, but also an historical space.”

Clifford & Pearson, Ch IV, Position, §19 On the Bending of Space
The Common Sense of the Exact Sciences (1885)
Context: We may... be treating merely as physical variations effects which are really due to changes in the curvature of our space; whether, in fact, some or all of those causes which we term physical may not be due to the geometrical construction of our space. There are three kinds of variation in the curvature of our space which we ought to consider as within the range of possibility.
(i) Our space is perhaps really possessed of a curvature varying from point to point, which we fail to appreciate because we are acquainted with only a small portion of space, or because we disguise its small variations under changes in our physical condition which we do not connect with our change of position. The mind that could recognise this varying curvature might be assumed to know the absolute position of a point. For such a mind the postulate of the relativity of position would cease to have a meaning. It does not seem so hard to conceive such a state of mind as the late Professor Clerk-Maxwell would have had us believe. It would be one capable of distinguishing those so-called physical changes which are really geometrical or due to a change of position in space.
(ii) Our space may be really same (of equal curvature), but its degree of curvature may change as a whole with the time. In this way our geometry based on the sameness of space would still hold good for all parts of space, but the change of curvature might produce in space a succession of apparent physical changes.
(iii) We may conceive our space to have everywhere a nearly uniform curvature, but that slight variations of the curvature may occur from point to point, and themselves vary with the time. These variations of the curvature with the time may produce effects which we not unnaturally attribute to physical causes independent of the geometry of our space. We might even go so far as to assign to this variation of the curvature of space 'what really happens in that phenomenon which we term the motion of matter.' <!--pp. 224-225

The Philosophy of Space and Time (1928, tr. 1957)

Grundriss des Eigenthümlichen der Wissenschaftslehre in Rücksicht auf das theoretische Vermögen (1795) GA I.3, as quoted/translated by Erhard Scholz, "Philosophy as a Cultural Resource and Medium of Reflection for Hermann Weyl" http://arxiv.org/abs/math/0409596 (2004).

De Abaitua interview (1998)
Context: As I understand, or as I hallucinate conceptual space, nearly all form in conceptual space is language, I might even say all the form in non-conceptual space is language, I’m not even sure of what the difference between physical space and conceptual space is anymore, in the interface. All form is language. The forms that we see, or imagine, or perceive, or whatever it is Remote Viewers are doing, in conceptual space are mindforms made from language, and by language I also mean images, sounds. We dress these basic ideas in language we can understand. Sometimes there are sizable errors of translation.

New York Times interview (1911)

Address to the 80th Assembly of German Natural Scientists and Physicians, (Sep 21, 1908)

Source: Living Systems: Basic Concepts (1969), p. 53; About conceptual or abstracted spaces

"Multiversality" (2013)

Introduction
Space—Time—Matter (1952)