Holmes sat in silence in the cab as we drove back to Baker Street, and I knew from his drawn brows and keen face that his mind, like my own, was busy in endeavouring to frame some scheme into which all these strange and apparently disconnected episodes could be fitted.
If matters came to a crisis I should endeavour to be present in person; but you can understand that, with my extensive consulting practice and with the constant appeals which reach me from many quarters, it is impossible for me to be absent from London for an indefinite time.
She would not endeavour to entangle the old gentleman in a sentimental attachment which might deliver him over to his enemy.
At his command she consented to pass as his sister, though he found the limits of his power over her when he endeavoured to make her the direct accessory to murder.
There are no more uses of "endeavor" in the book.
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I endeavored to get both sides to agree to a compromise.