Caroline meditated in her own way on the subject; speculated on his feelings, on his life, on his fears, on his fate; mused over the mystery of "business," tried to comprehend more about it than had ever been told her--to understand its perplexities, liabilities, duties, exactions; endeavoured to realize the state of mind of a "man of business," to enter into it, feel what he would feel, aspire to what he would aspire. 
She speculated on his feelings, on his life, on his fears, on his fate; mused over the mystery of "business," tried to understand its perplexities and duties, and to enter into his state of mind, to feel what he would feel. 