《Tetrabiblos》Brothers And SistersClaudius Ptolemy（Ashmand 英譯 1822）
Under this head of inquiry, a general and cursory investigation, only, can be performed; and an attempt to dive into minute particulars would be fruitless, and would prove to be merely a vain search after things not open to discovery.[128] The place, whence inferences are drawn respecting brothers and sisters, is to be considered as being applicable only to children of the same mother, and it is consequently, agreeably to nature, presumed to be the same as the maternal place; viz.
段落 tetra-3-brothersan-1public-domain (Ashmand 1822)
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