easy to understand

References in classic literature ?
The detective was evidently inspired by the hope of obtaining the splendid reward which would be the prize of success, and awaited with a feverish impatience, easy to understand, the arrival of the steamer Mongolia.
That, you see, except for curious spelling, is not very unlike our English of to-day, although it is fair to tell you that all the lines are not so easy to understand as these are.
I am sorry to say that no one had ever told the little boy much about fairies of any kind; this being the case, it is easy to understand how much this strange experience startled and astonished him.
On this supposition, it is easy to understand why he waited until nightfall before he made the attempt, and why he took advantage of the clerk's absence to possess himself of the keys.
After this explanation it is easy to understand the importance which Suzanne's lie, confided to Madame Granson, was about to acquire.
In that case it is easy to understand their fear of the dead, who really were a menace and an evil.
Of these sentiments, all easily provoked, but not always easy to understand, the last had the greatest moral efficiency - because Mr Verloc was GOOD.
Hence, edifices comprehensible to every soul, to every intelligence, to every imagination, symbolical still, but as easy to understand as nature.
It is easy to understand, therefore, that Pope was readily drawn into quarrels and was not an agreeable antagonist.
Only at first it was not easy to understand what it was.
It is easy to understand if we call it guilty horror; it is beyond all understanding if we call it anything else.
I can see too well that I am not high in the old lady's opinion, and it is easy to understand what an irksome clog I must be upon the hospitalities of her orderly house- -especially at this time of year--when I must be kept asunder from this person, and there is such a reason for my not being brought into contact with that person, and an unfavourable reputation has preceded me with such another person; and so on.