Considerable sympathy was expressed for the mother of the deceased, who was greatly affected during the giving of her own evidence, and that of Dr. Birrell, who had made the post-mortem examination of the deceased.

【翻译】人们对死者的母亲表示了相当的同情，在她自己提供证据以及那位曾给死者验尸的Birrell医生提供证据的过程中，这位母亲的精神颇深影响。

【分析】the giving of her own evidence是动名词短语，意为“提供她自己的证据”，giving的逻辑主语是the mother。