Extract dates and places from faded postmarks

Photograph the entire envelope and a close view under even light. Keep the unedited image alongside any version with adjusted contrast.

Find an envelope with two clear letters on a circular impression. Ask a reader to verify a small part of your work against the source without seeing your conclusion first. They may notice how a word, date or position was framed on the original. Add a separate note where two competent readers differ, so a later correction has somewhere to go without overwriting the earlier reasoning.

Their position around the circle can help narrow possible place names. Put alternative readings next to one another and give each the evidence it explains. If two records are linked by a common address or surname, look for an additional clue that belongs to the individual case. A repeated detail may be meaningful without being distinctive enough to establish the link on its own.

Compare the stamp, address and internal letter date. These details can place a mailing in context while leaving room for forwarding or a delay.

A postal transit mark may show a different town from the sender's address. Tie each observation to a place in the source, such as a page, side, timecode or corner of a frame. A record that says where a detail was found is useful even when the immediate interpretation changes. It also saves the next reader from starting the search again at the first page.

Compare the impression with dated marks from its suspected region. Start by keeping an untouched image or recording of the whole item. Any enlargement or contrast adjustment belongs with a working copy that identifies its source. This gives a future reader the chance to evaluate a faint character or an ambiguous detail without relying solely on the edited view.

Record what the contents establish independently of the postal evidence. The most helpful comparison preserves order. Use the source order for transcriptions and marks, and create a separate chronological or alphabetical view when it helps the reader. This lets you search a useful index while returning to the original arrangement if the relationship between adjacent items becomes important.

Use a short descriptive filename alongside your record number and keep the two linked. Avoid using the proposed interpretation as the only identifier. An uncertain author, place or date may change when someone sees an overlooked clue, but the connection between the item and earlier notes should remain easy to follow. Give one entry to a reader who has never handled the material. They should be able to find the source, distinguish your wording from its wording and see the reason for your conclusion. If they ask whether a detail came from the item itself or a later recollection, add that distinction where they first needed it. Give a damaged final digit a transcription marker even when a letter inside suggests a plausible year. The two dates may represent different events. Use a distinct field for information supplied by another person, a secondary publication or a newer edition. Give it a date and an attribution. A remembered detail may be worth keeping beside the original object even when you are unable to reconcile it with what the object appears to say.

Record an unreadable character as a gap and note what a clearer view would need to show. Give each individual item a location record even when several items share a title. Where a group arrives in a box or envelope, preserve what was together and how you found it. That lets you build an alphabetical or chronological index later without quietly changing evidence supplied by the earlier grouping.