Further to 50's gal's post about visiting the new neighbours...here's what Mrs B has to say.
"IN A NEW NEIGHBOURHOOD.
When taking a house in a new locality, it is etiquette to wait for the residents of longer standing to call, thus evincing a desire, on their part, to become acquainted. It may be that the mistress will desire intimacy with but a few of her neighbours; but it is to be borne in mind that all visits, whether of ceremony, friendship , or condolence, should be punctiliously returned, though some time may be allowed to elapse in the case of undesirable acquaintances.
Letters of Introduction. - You may perhaps have been favoured with letters of introduction to persons living in the neighbourhood. In this case, enclose the letter of introduction in an envelope, with your card, and leave it at the house. Do not, however, wait to be received on this occasion. If the person to whom the letter is addressed call in the course of a few days, the visit should be returned by you within a week, if possible. It is more usual to write by the post and introduce a friend, instead of leaving everything to be said by the letter that is give. Men, especially in business circles, frequently introduce by scribbling across a visiting card "To introduce Mr._______."
In the event of your being invited to dinner, after calls have been made as above, nothing but necessity should prevent you from accepting. If you really cannot accept, state the reason frankly. Opportunity should also be taken to call in the course of a day or two, to express regret that circumstances made it impossible.
Giving a Letter Of Introduction. - Always pass a letter of introduction to your friend unsealed. Courtesy dictates this, on the assumption that the person you are introducing is naturally interested in knowing the manner in which he or she is referred to. Should you receive a letter from a friend, introducing a person known to and esteemed by the writer, the letter should be immediately acknowledged, and willingness expressed to do all in your power to carry out his or her wishes."
Have you ever received a letter of introduction? Or been asked to write one? The closest thing to this nowadays that I can think of is the "Friend of a Friend" section of facebook... you may know this person..do you?
And wouldn't it make it easier to get to know people if you were introduced by someone already in the know...